I rebuilt the carburetor and let the car idle for a while. During this I wanted all accessories to move and also turned on the heat. It came on as always and after about 30sec the blower went off again. The power servo started to move in and out all the time by itself, but the blower would stay off. The idle speed up came on and off as well depending on the placement of the power servo. After a while it stopped doing this and stayed in the fully retracted position (full heat). If I turned the temperature dial it did not change anything - but it was around freezing outside and this is what it should, do as the sensors sense the low temperatures and then send the system into full heating mode.
I checked the following things.
- Master Switch seemed to work and gets engaged by vacuum. Power is going through it as it should. Current is going in and out. (This is what I thought…)
- Blower Motor tested with a direct feed - worked
- Blower Motor Relay - tested. Put a 12 V feed to the dark blue connector and it engaged and the blower motor came on. There was no current coming through the blue wire though.
- Power Servo - cleaned all contacts and measured the resistance in all positions - looked good to me
- Control Head in Dash - removed it and checked the blower switches - it seemed to work.
Full vacuum was applied to the power servo, and I also checked the vacuum and voltage at the transducer. I also checked all vacuum actuators with a vacuum gauge, but everything checked out perfectly.
I then put everything back together. Still the system did not work in the full heat position. I did a lot more tests and checked the vacuum and electrical diagrams.
I ordered the 1966 AC manual from "Cadillac Tim" which is available also on ebay for $45,- . These instructions are a must-have for your car, as everything about the AC system is explained very well by Tim. There is a great troubleshooting guide in there. Its money well spent! Tim also offers a rebuild service for many Cadillac parts and has a great selection of refurbished parts. Check out his website!
The 1966 dash control unit - here you can see the amplifier part.
After days of troubleshooting it finally dawned on me where the problem was. I had checked the master vacuum switch multiple times and when checked it always had electrical continuity. But I did not check it correctly. I only pushed the backside of the switch until I heard a click.
I should have tested it with full vacuum applied. As it turned out, if high vacuum was applied to the switch (during heating mode), the switch did no longer work correctly!
The contacts did no longer touch when full vacuum was applied to the switch…
Today I took it apart and made a video about it. As it turned out the switch contacts did not align as they should and I had to bend it a little bit to make it work again. I then put everything back together and now the AC system works perfectly again. Check out the video for all the details!
The Eldorado now purrs like a kitten again with its new Quadrajet. I now have two more carburetors to do - the 1966 has a stuck choke and the 1978 needs a new accelerator pump.... The video is also available on YouTube in 4K HDR quality...
I took a short video of the installation process.
The rebuilt Quadrajet on the bench.
The old original 1967 Eldorado Quadrajet - this is the non California version.
The rebuilt Quadrajet installed.
A new gasket was installed in the correct order then, and the car ran really good until recently, when the car suddenly had the exact same symptoms again…
I ordered new gaskets again and removed the carburetor from the car.
Click to READ MORE!
This switch is almost impossible to find GM #7805676 ACD# D6230. It is for 1967&68 Cadillacs with Tilt and Telescope column.READ MORE...
The restoration shop let me know that my 67 Eldorado was finished and ready for pick up.
After work my wife and I jumped into the car and drove 2 hours to Radstadt where the restoration shop is located.
I saw the finished car for the very first time.
The job Bernd Preussler and his small team did is amazing. The paint job is the best I have ever seen. Their commitment to details is outstanding.
The small team that restored my Cadillac. Thank you so much for your great work! You are my heroes!
Michael Hammer, Bernd Preussler, Angela Steiner (from left to right)
The restoration shop on the other side did a fantastic job so far. There are some minor details they still want to address and the car should be ready for pick up sometimes in May.
Here is a short video I took with my phone at the shop when I delivered the bumper, showing the almost finished car. Make sure to watch in HD to see all the details
The almost finished car still in Bernds Restoration Shop
Whenever you restore a car you can learn a lot about it. The ongoing restoration of my 67 Eldorado is taking a little break now, and here is a summary of things we have learned so far during the restoration process:
There seems to be a design and/or a problem at the front windshield which causes rotten floors and rust in the A- pilar:
Although my car is a low mileage car (28k miles) with no other real rust issues, the front floor of my car had to be replaced as we found out when the carpet was removed. I have heard some similar stories from fellow Eldorado owners who had the same problem with their cars. Some of them owned very low mileage texas cars and had rotten floors and/or rust in the A-pillar. The water seems to enter at the A-pillar and often causes rust through holes there. It can then seep into the car, where it ends on the front floor, from where it cant evaporate due to the rubber insulation used underneath the carpet. When the windshield on my car was re-installed, we made sure that it seals perfectly and we used some modern material to make sure there wont be any future issues. The front floor on my car had to be replaced as you can see on the pictures of my restoration gallery.
The cut out front floor.
Today was especially exciting. I saw the Eldorado in its new paint for the first time!
Doesn't she look spectacular in its fresh coat of "Atlantis Blue Firemist! ?
Bernd and his team did an awesome job so far as you can see in the restoration gallery.
There is still tons of work left - but everything looks very promising so far.
In the paintbooth with fresh paint.
First time in the sunlight, with the first trim parts already installed.
While the exterior of the car did not have much rust I was surprised that the front floor of the car had quite a bit of rust.
Some of the previous owners seems to have tried to stop the rust on the floor sometimes in the past by applying a good amount of rust converter, or whatever the black paint was , he applied over the rusty floor.
It seems that it did not help but just made the sheet metal oxidize underneath this sticky mess.
The restoration shop now started to remove this paint just to find some weak metal with some holes in it.
This is when they decided to cut the entire front floor out and replace it with some fresh metal instead.
They had to make a patch panel from scratch as no new panels are available for this car anywhere. The new custom made replacement floor was now welded in.
Like on the factory rubberized undercoating was reapplied underneath the car and the welding seams were sealed with seam sealer.
You can see all the detailed pictures in the restoration gallery here.
I hope this was the last unpleasant surprise for a while…
This showed up when the carpet and the seats were removed…
After removing the black mess, the weak metal and some rust holes showed up.
Unfortunately the original floor had to be cut out…
Big hole in the floor.
A new custom made patch panel is fitted and will be welded in.
The new custom made patch panel as seen from the underside.
The new panel is completely patched in.
Seam sealer was applied like it was done at the factory. In the factory they just painted over the seam sealer. We will do the same here.
This car came with factory applied rubberized undercoating which was re-applied over the patched floor.
For a few years now it's a tradition to shoot a card with one of my cars for the annual season´s greetings. This year my 1967 Cadillac Eldorado made it on our card.
All the best to the visitors of my website!
My lovely little family.
The restoration shop is sending me detailed pictures of the process. They are really doing a great job. Very exciting times.
Of course there are the first unpleasant surprises to be seen - there is a little more rust around the rear window than I expected, but still nothing serious. After disassembly we could see that the car is in fantastic shape.
You can find all the pictures of the restoration here on my website as high res pictures.
One of the previous owners of this car tried to touch up the paint in some areas but it was not done properly…
I bought the car in 2009, and since then I was planning to repaint the car to make it perfect.
Being a perfectionist I had a hard time finding a shop which is up to my quality standards and work ethics. During a photo-shooting I came in contact with a shop about 2 hours from where I live. My wife and I were invited to photograph one of the owners Hotrods and he also owns a Cadillac with a breathtaking paint job. While we were there I was extremely impressed by the cleanliness of his shop and the quality of the work I saw there and especially about the attitude of the owner Bernd. A couple of years later 3 of my cars needed some little paint touch ups which made me pretty nervous. But Bernd did the most excellent job on my cars, so that I asked if he could also do my 67 Eldorado.
Unfortunately a couple more years went by where I did not have the financial means to do the job.
Last year - out of nowhere I was contacted by an uncle I had not had any contact for the last 42 years after my dad was killed at a work accident. To make a long family story short - he "inherited" me a very generous amount of money - almost as much as I´ll need for the paint job of my 67 Eldorado.
Yesterday I delivered the car to the restoration shop.
After a long and thorough inspection by the shop owner, the restoration will start soon. The owner is optimistic that hopefully there wont be too many bad surprises hiding. He measured the paint thickness and found some evidence that some damage might be hiding in the right rear quarter panel. Maybe the car had a fender bender sometimes in its previous life.
The car will be completely disassembled. Front and rear glass will be removed. Fenders, hood, trunk and doors are coming off. The interior will be completely removed, but the body will stay on the frame.
Then everything will be taken down to bare metal by sanding, as its too cold to strip the paint with chemical paint stripper during the winter months.
Every step will be documented with pictures which I will post here on my website as well. So keep coming back to follow the restoration if you are into this kind of entertainment.
I´m so happy that the car will be fixed at this shop. It's the first shop I have no worries about the quality of job done. Bernd - the shop owner - is a perfectionist like me. He only accepts perfect quality and wont take any short cuts.
FINDING THE RIGHT COLOR…The big question for me now is if I should have the car repainted in its original "Grecian White" color, which I am not exactly a big fan of, or repaint it in one of my favorite 1967 Cadillac Eldorado Colors "Atlantis Blue Firemist" which was a pretty expensive optional paint in 1967
When I asked my friends to help me decide, about 80% said I should paint it in "Atlantis Blue Firemist"… If I could go back to 1967 and order one from the factory I would probably order the blue one…
I was also informed that the Cadillac LaSalle club does not deduct any points during judging if you do a color change, as long as it is done in a correct color for a certain year…
Being an originality buff - I´m having a hard time to do a color change though. My little son also wants to keep the car white - my wife would like to have it changed to blue… I´m sure whatever I decide - I will sometimes regret my decision. If I paint it in its original white I will always find the color on the boring side and if I paint it blue I will regret that I changed the original color…
The last The last picture of the 67- still with the original paint.
The car at In the restoration shop during the first inspection. The owner of the shop was pleasantly surprised by the condition of the car.
Cadillac buyers had quite a color choice for the 1967 model year. Here is the original 1967 Cadillac Exterior Color Selections Dealer Book
Code 90 - The optional "Atlantis Blue Firemist" is my favorite color for the 67 Eldorado.
Atlantis Blue Firemist cars were used for advertising the new 1967 Eldorados - Color Code 90. This would be my favorite 1967 Eldorado color…
My car still looked flawless on pictures until you looked closer…
One of the areas where the paint was flaking off.
Some of the areas where the paint was pretty worn and surface rust was developing.
The rear window had to come out to fix this "repair" attempt by one of the previous owners…
These vacuum hoses unfortunately get extremely hard and brittle over the decades under the harsh conditions in the engine bay. Often they literally break into pieces by just touching them.
On my 67 Eldorado I had to replace most of the vacuum lines when I got it - and it really has a lot of hoses.
When I searched for reproductions I could not find a really good source and I gave up.
At my ongoing project on my 74 another of these original lines fell apart while working in the engine bay. So I started to look for the correct hoses once again.
Soon I found a link on ebay to a well known seller, whose name I do not want to mention, offering the lines in all the colors I needed.
I ordered quite a few Ft of each color.
The seller describes them as factory correct and as a perfect part - see screenshots below.
As they do not ship to Europe, a friend of mine was so kind to forward the hoses to me.
When they arrived I was shocked - I have never ever seen a worse product.
The paint is peeling off or missing at all. As soon as you even slightly bend the hoses, the paint on the stripes just cracks and falls off. It could not be worse.
Also the hoses are too thick and the walls are to thick. The original hoses are quite a bit slimmer than these crappy reproduction hoses.
They also charged me for 15ft of red striped hoses but only sent 10ft. This was about the worst buying experience ever.
I´m trying to return the hoses at the moment - but communication with this seller is terrible.
I normally never criticize sellers here on my website and never leave any negative comments on ebay - but this is the worst I have ever experienced.
Shipping back these hoses will cost me at least $50 and I already paid $60 for having them shipped to me in Europe - with the import tax I will have lost $160.- for this BS… Money I would urgently need for some other parts… :-(
I´m now trying to find another good source for quality reproduction hoses. There is one Corvette parts dealer which looks promising as he offers some great kits for Corvettes, but they are all pre-cut… I hope he can send me some ft. of the hoses I will need - I hope that I will get a positive reply.
Ebay seller screenshot - this is how they describe the hoses…
As you can see the paint stripe is just cracking everywhere.
As you can see the paint stripe is just cracking everywhere.
As you can see the paint stripe is just cracking everywhere.
As you can see the paint stripe is just cracking everywhere.
As you can see the paint stripe was not even painted correctly on the green hose…
The gasket was replaced a couple of times since I own the car, but it never was very successful in stoping the leakage.
After my last attempt it leaked even more than before…
The valve cover design of the 429 engine is not exactly the best from a technical standpoint. It's only held in place by 4 screws.
I did some research and tried a different approach this time to seal it.
First I used a different valve cover from a spare engine I have in my garage which did not show any signs of leakage.
I had to fully detail it first to make it look perfect. I repainted it with Bill Hirsch Engine enamel in the correct color.
I made sure that everything was flat as these cover often get warped at the bolt holes by over tightening them.
They checked out flat. I then glued the new cork gasket (I used a Fel-Pro gasket) to the valve cover with high temp gasket sealer. To make sure that it stayed where it belongs to I used a lot of cloth pins to keep the gasket in place.
I let it dry over night.
The next day I put some wheel bearing grease to the other side of the gasket and put it back on the heads. The grease helps to make sure that you can remove the gasket any time again.
I then tightened the four bolts to 28 INCH/Pounds of torque as specified by the shop manual. (thats 3,1 NM) I had to buy a small torque wrench for such a small torque rating first… I could have never guessed how much torque it is.
I then ran the engine and let it cool down and re-torqued the bolts afterwards.
After the first 25 miles test drive it seems that the valve cover is 100% leak free for the first time since I own this car.
I´m not sure what fixed it this time, but during my research I read multiple times, that for cork gaskets one should not use gasket sealer on the head side of the gasket, and one should only use grease instead. Some recommend that gasket adhesive (spray) should be used to keep the gasket in place in the valve cover.
This time the 67 Eldorado had a new problem which I had to fix.
It suddenly only blew hot air out of the AC outlets. It did not change modes at all. That was a sign of a weak vacuum signal…
I started to inspect all the AC related vacuum lines of the car which checked out fine. Next I did the test I´m describing here in an older posting, as I suspected that the power servo had a problem.
I soon found out that still not enough vacuum was supplied through the transducer.
That meant that either the transducer could be faulty, the temperature sensor could be defective, or the dash control head would not work properly. I took out the temperature sensor of my 67 Deville to test it in the Eldorado but it did not change anything.
I then removed the control head and tested it with a spare one I once bought cheaply on ebay. It did miss some connectors and switches, it had some blemishes on the chrome and did not look good enough to install it into any of my cars. When I put it into the Eldorado anyway the AC suddenly worked perfectly again.
So I removed all the electrical parts from this working unit and transferred it to the perfectly looking but defective control head. After I had swapped all the usable parts I put the unit back into the car and I now have a perfectly working unit once again.
It looks like that there was a problem in the amplifier part which translates the signal coming from the rheostat into a current going to the transducer which regulates the vacuum going to the control head and the power servo.
Lets see what issue comes up next spring…
The Rheostat when set to the lowest temperature setting shows around 2,5 Ω You can check if it is working with an Ohmmeter.
At the highest temperature setting the resistance is getting lower.
The Amplifier part of the control head is on the underside. Something in here must have gone bad on my control head. I will try to find out what went bad and repair it to have a spare part.
The 67 Eldorado is back on the road for the 2015 season.
The last time I tried to repair the clock in my 67 Cadillac DeVille I totally failed. This was in 1998…
After I got the clocks in all the other Cadillacs moving again - I could no longer stand watching the dead clocks in my 67 Eldorado and DeVille.
So I decided to try to repair them as well.
The last repair attempt at my 67 Eldorado was very disappointing.
In 1998 I took the clock out of my 67 DeVille the last time, and after my repair attempt the hands started spinning in an extremely fast pace - like a ventilator. So I had to disconnect the power to the clock at the printed circuit at the back of the instrument cluster. When I did that I forgot to disconnect the battery and when the power feed touched some metal I had a short somewhere and some smoke came out of the dash… I could not locate where the smoke was coming from - all wires looked perfect. So I just insulated the clock coil power feed and gave up on the repair and forgot about what had happened.
As I found out now - some connection of the printed circuit board got burned back then…
After the failed repair of the 67 Eldorados clock last fall, I decided to try to find a good used clock. Once again Arizona Vintage Parts - my favorite source for parts - came to the rescue. He sold me two non working Borg clocks for a really good price. Unfortunately by now he has run out of stock for them.
So I tried to repair the clocks he sent me - appearance wise they were in very good condition, and I got one back to life for a short time by just cleaning it.
So I put it back into the car and then I made a stupid mistake and ruined it completely. I wanted to tighten the mounting screws and accidentally grabbed the connector for the coil - as you have to work inside the dash without being able to see what you are doing - and so I overtightened it… This stripped the threads of the coil… I had to cut the nut off then and somehow the oscillator wheel inside the mechanism did no longer work properly and when I tried to adjust the stepper it broke off :-(
BTW - Do not use WD40 for cleaning and lubricating a clock like I did… This will ruin the clock as I found out when it was already too late… There are special clock oils available to lubricate clocks.
The other clock I got had a defective oscillator wheel and I could not repair it as well…
So I contacted Arizona Vintage Parts once again for some new clocks but he had sold all his stock on clocks to Sweden…
I had to contact all the Cadillac Parts dealers I found in Hemmings Motor News for two Borg clocks, but I was unsuccessful or they were exorbitantly expensive. Some of the well known Cadillac Parts dealers either did not have them, did not react to my inquiries or asked up to $ 385.- for a used, rebuilt clock. Others asked up to $180.- for a non working clock.
Luckily I found a company called “The Clockworks" which was highly recommended on some Cadillac and other classic car forums for their good work in repairing clocks and also converting them to a quartz movement.
Everybody seems to recommend to convert your clock to a much more reliable and cheaper quartz movement. I thought about it for a while but I decided that I wanted to go for an original movement for authenticity reasons. If you convert to quartz the "tic-toc" movement will be gone and you can tell by just looking at the clock…
I ordered two rebuilt Borg clock movements for my clocks from "The Clockworks". Their service was excellent and they were a great help. Great customer service! I would buy from them again or have my clocks rebuilt by them anytime.
After I received the movements I installed them and put everything back together. You have the keep the adjustment stem and the housing from your old clocks if you replace the movement.
When I put the clock back into the 67 DeVille it did not work though. I soon found out that no power was coming to the coil through the printed circuit board.
I then remembered about my failed repair attempt 17 years ago and the smoke that came out of the dash… Somewhere the circuit board was burned. So I connected the orange cable going into the multiple terminal connector at #7 terminal to the clock directly and it worked again.
So I installed a cable directly to the clock. This is a temporary fix until I´ll have a new circuit board. Installing a new board requires to take the dash completely apart to replace it.
A printed circuit board is available new here: https://www.opgi.com/cadillac/CE11091/
The 1967 Cadillac Westclox clock out of my 67 Eldorado. Seen from the top with the clock face removed. The clock face on the Westclox is mounted differently than on the Borg.
The 1967 Cadillac Borg clock. The housing cover in place - as you can see it looks completely different than the one on the Westclox.
The 1967 Cadillac Borg clock out of my 67 DeVille.
The Borg replacement clock I got from Arizona Vintage Parts.
The Borg replacement clock I got from Arizona Vintage Parts - this is the original movement removed from the housing.
The rebuilt Borg movement I got from "The Clockworks"
There is a difference in the second arms: On the left the one from a Borg Clock - on the right one from a Westclox. They are not interchangeable. Also the housing of the clocks is different. You cant interchange parts between these two clock types.
I repainted the setting stem in semi gloss black.
The 1967 Cadillac printed circuit. The one for the Eldorado is slightly different though.
After many years they tend to fail for many owners of the 1967 and 1968 Eldorados.
One company has offered a reproduction, but from the experience some people made with it, it was said that it was very poorly made and extremely expensive. I can´t tell anything about it from my own experience though.
But there is a better and much cheaper solution to the problem in the form of a modified reproduction 1969 Camaro RS actuator which is readily available. I´ve written an article a couple of years ago what could be done and I have now updated it, as one reader sent me some excellent description and pictures of how he modified the Camaro actuator to work perfectly on his 1968 Eldorado.
Thanks for the tip Mark Maromonte from Marks Truck and Auto Repair.
So it was time to service some of the clocks which stopped working over the years.
The clock in the 66 did not work at all.
It's extremely simple to remove on the 66 as you can get it out of the instrument panel by just unscrewing one bolt.
The clock was very dirty in the clock work and needed a good cleaning and some good lubrication. Also the contact of the coil was a little worn and this was fixed. It then happily ticked back to life and now works perfectly.
The clock on my 58 stopped working a couple of years ago. So it came out as well. It's a little more complicated to get it out though...
When it was finally out - it could be seen that the coil was burnt and that it needed some very good cleaning as well. Some of the melted insulation material was all over the clock mechanism and of course I had no spare coil for it - so the original one had to be rewound with some good wire from a left over light solenoid...
Wow - this really took a while - but now the clock works perfectly again!
I was not so lucky with the clock on the 67 Eldorado which only worked when the car was warm. To take it out you have to remove the upper dash and then get out some light bulbs and disconnect it from the printed circuit.
It was also cleaned and lubricated and the clock worked, but it made a very loud noise when the coil rewound the spring of the clock.
The sound got better over night, but then the clock stopped working completely... It's a Westcox clock which uses a double coil and is much more complicated to rebuild than the Borg clocks. Its also almost impossible to find parts for it, as Borg clocks are much more widely used.
Looks like I will need a new 1967 clock and replace it with a Borg unit :-(
The clock in the 66 is now working perfectly again.
The disassembled clock of the 58 Eldorado.
The coil was burnt on the 58 clock.
Fully cleaned clock.
Back together with a rewound coil.
Back in the car - working perfectly again.
When I took the car out of the garage I noticed that the headlights did not come on, but the taillights worked.
I suspected that the light switch must be the problem... I unplugged the connector of the switch and tested if 12V power was coming to the switch through the wiring.
There was one hot wire and I connected it directly to the headlights and they came on.
I then wrongfully assumed that the switch must be the problem then...
So I decided to take it out and inspect it.
Getting this switch out is a real pain as there is one screw thats almost impossible to reach. You can only get to the switch from underneath the dash btw...
It took me a couple of hours to get it out lying on my back under the dash...
I then opened up the switch and when I opened it up it fell apart immediately. I had a really hard time getting it back together correctly. Before that I cleaned everything inside.
I measured it with the multimeter and everything was fine.
Getting the switch back into the car was even more difficult than taking it out... There is this one d*mn screw thats almost impossible to get back in. Try to avoid to take the switch out, as you can measure if it works with the multimeter. I did not read the electrical diagrams carefully enough, so I did not measure it correctly and so I took it out.
!!! Be aware that the headlight switch on the 67 Eldorado is almost impossible to find, as it is a very special switch with the vacuum valves! If yours has twilight or auto dimming its even harder to come by!!!
As it turned out my switch was o.k. and the headlights did not work for another unknown reason... So I googled the problem and to my surprise I found my own website with a solution!
I had completely forgotten that I had the very same problem with my headlights a couple of years before and found a solution back then. I was just lucky that I do use my website as a sort of diary for the repairs I do on my cars.
As it turned out the same fusible link had burned through again. It runs very closely to the headers to the starter on the positive battery cable. Maybe it got too hot and failed or just broke apart. I could not see any melting or signs that it had burned through. It looked fully intact from the outside and I could only see that it was defective when I removed the insulation...
To replace the fusible link you have to take out the positive battery cable and replace the fusible link. Thats not a big deal. I rerouted the cables a little bit this time and hope that it wont fail again.
The 1967 headlight switch with automatic dimming
the light switch out of the car
Seen from the side - you can see the vacuum valves
Be very careful if you take the switch apart - as some parts will fall out...
The red cable on top is a fusible link and it caused the problem. I could not see from the outside that it was broken under the insulation.
The headlights are back in working order
I got a new remanufactured POA valve (suction throttling valve) from Classic Auto Air to make sure that the system can cope with the much higher pressures of R134. Classic Auto Air was very helpful with providing the factory correct parts. Classic Auto Air says that the re-calibrated valve can make a 15-20º F / 6º C difference.
Yesterday I got the Eldo back from the shop and so far it seems to cool the car down properly. The air discharged out of the vents is 10º C / 50º F cold - not bad for R134.
This is what Classic Auto Air is recommending for a change from R12 to R134:
- Change or restore the filter-drier.
- Drain the compressor oil and recharge with 134a compatible oil. (PAG or Ester Oil)
- Insure that the system is clean and free of contaminants (Depending on component condition, this may be a simple matter of blowing out with compressed air or liquid flushing with an air-conditioning flushing agent)
- Replace or restore all rubber hoses with barrier hose.
- Install 134a charge port adapters
- Send POA valve in to be calibrated
- Charge with 134a between 70-80% of the original R12 charge amount.
- Replace any o-rings with 134a compatible
- Install hi/lo pressure switch
- Ignore the sight-glass. A properly charged 134a system will likely show bubbles in the sight-glass.
- Typical 134a charge rate will be approximately 70-80% of the factory R12 charge amount.
The new factory correct POA valve. Internally it was calibrated for the use of R134 instead of R12. The expansion valve was also replaced together with the evaporator, condenser, compressor, O-rings, filter-dryer. I did not install a hi/lo pressure switch which would cycle the compressor on and off to keep the car original.
THE 1967 CADILLAC AUTOMATIC CLIMATE CONTROL SYSTEM - MORE ISSUES - AND A FINAL FIX? RESTORING THE POWER SERVO VALVE!
The 67 Eldorado lost its complete charge of refrigerant over the winter - so it will have to go back to the shop to see where it is leaking. All components were replaced with new ones last year and so I have no idea where it could have leaked out. A tracer was put in before the last recharge so we should be able to find the leak. I guess that it will be one of the original hoses are a bad fitting.
Another thing that bothered me was that the system basically worked most of the time, but sometimes I had to wait for a long time before the system came on, or I had to switch to “FOG“ or “ICE“ position before the blower would come on in the “Auto“ position. Then sometimes the blower would cut out again if the temperature dial was moved to a colder temperature. Sometimes the temperature would move to full heat regardless off the selected temperature in the 67 Eldorado.
I had the very same problems on my 67 Deville as well - but there also the “Vent“ and “Low“ position did not work at all...
So I started trying to find the issues and finally wanted to fix them. Sounded easy - but it took me 4 full days with long nights in the garage to fix it...
BTW - Cadillactim has an excellent trouble shooting guide for the ACC on his website - its for sale for $ 45.- and I can highly recommend it if you are troubleshooting your 1967 or 1968 Air Condition System.
A great troubleshooting guide for 1967 and 1968 Cadillac´s Automatic Climate Control Systems I got from Gary Sisk - owner of a 1968 Cadillac.
This is a very easy to follow explanation which will save you a lot of time and you do not even need any special tools.
It was written by Lynn Nicholls and can be found on Stampies Cadillac page - here is the direct link to it. I used some excerpts from his document in the explanation below:
I first suspected a vacuum leak to be responsible for most of the erratic behavior of the system. A clear indication was that the system would initially have to be switched to the “ICE“ position to make the blower come on.
Lynn Nicholls writes:
“Sometimes the dash control can be switched to the fog or ice positions to bring the blower motor on and then when it is switched back to auto the blower may stay on and the system seems to work fine until the car is shut off. If the vacuum leak is only moderate there may be enough vacuum to hold the master switch closed once it gets , but not enough to pull it closed in the first place. When the dash control is switched to fog or ice, it assumes the air temperature is cold and that the engine is not yet warmed up, but that the blower is needed immediately for defrosting the windshield. So it supplies vacuum to the master switch through another circuit, bypassing the temperature controlled vacuum switch on the heater core shutoff valve on the right fender well. This source of vacuum is enough to close the master switch.When the dash control is switched back to auto this vacuum source is shut off, but there may be just enough vacuum left from other circuits to hold the switch closed. This routine will work for a while but as the leak gets worse, there won’t be enough vacuum left to hold the master switch closed anymore and the blower will shut off again as soon as the system is switched back to auto.With these symptoms and behavior the problem is most likely the power servo. This is half the brains of the system; the other half is the control panel in the dash. The power servo is controlled by a varying vacuum signal from the transducer. This vacuum supply is a completely separate circuit from that which supplies vacuum to the master switch. High vacuum moves the servo to the maximum heater position, and with low vacuum, a return spring moves it to the maximum AC position. In between these two extremes, it regulates the air temperature door to blend warm air and cool air, and simultaneously regulates the blower speed. It also spins an internal rotary vacuum valve back and forth that makes various connections between the several small vacuum lines on the top. This rotary valve controls the various vacuum motors of the system that operate the AC, heater, and defrost functions. It is this rotary valve that goes bad. l have seen these things visibly warped, and very badly so. It must be caused by engine heat, because there is also one inside the car on the control panel that is moved back and forth by the dash control lever, but that one seldom seems to cause any trouble. A warped rotary valve leaks all kinds of vacuum and the first part of the system to be affected by low vacuum is the master switch; there’s not enough vacuum there to close it and turn on the blower. To verify this is the problem, take some spare vacuum line, some scraps of 1/8 inch pressure line (like for air shocks), and a vacuum T and manually make the connections that the rotary valve should make in the maximum AC position. The connections that the rotary valve makes in various positions are shown in the factory shop manual. Disconnect the black connector with the striped vacuum lines from the power servo. Connect the yellow, red, and purple lines together with a T; also connect the tan and blue lines together and connect the orange and green lines together. If this rotary valve is the one and only culprit the AC will now work beautifully and the blower motor will come on every time, like magic. With the dash control on high the system should be recirculating air and there will be a lot of air noise coming from under the right side of the dash; when the dash control is moved to auto the air door should move to provide fresh air and the system will become much quieter. Of course with these manual connections the system is not fully automatic and the heater won’t work right at all, however this is enough to diagnose the problem.“
I did this test (see picture below) - and with the power servo bypassed everything worked as it should. This way I knew that the power servo was to blame for some of my problems.
So this rotary valve needed to be repaired...
I removed it from the power servo and disassembled everything.
The removed power servo
After opening the cover, you can see the rotary valve in the lower center.
Remove one screw and a clip and the rotary valve comes out.
The rotary valve consists of two halves which make the connections - as you can see it was very dirty and rough - and slightly warped.
I started to wet sand both halves with 800 grit sandpaper.
When everything was flat and shiny again I used some 2000 grit sandpaper for a perfect finish.
Looks shiny and flat again
Make sure that none of the ports are clogged - I used compressed air to clean everything.
When you put the two halves together lubricate with WD40 to make sure that when you put them back into the power servo that they are properly held together with the underlying spring.
After I reinstalled them into my cars - almost everything worked as it should. In the 67 Eldorado I still had the problem that in the “AUTO“ position the fan would always be slow - so I knew that the control head in the dash had a problem with the “LOW - AUTO“ switch as well.
In the 67 DeVille the “VENT“ and “LOW“ position still did not work at all...
So I switched the control panels between the two cars and suddenly everything in the 67 Eldorado worked perfectly. I never had such a perfectly working system before. Its like it just left the factory!
In the DeVille I still had no “VENT“ and “LOW“ settings working... So out came the control panels again... (its a pain in the a*** to remove and install them...)
As it turned out the “LOW-AUTO“ switch on one panel was stuck in the “LOW“ position. You can easily remove it and readjust it to work again - sorry I forgot to take pictures. Make sure that all switches on the control head are adjusted properly or they wont work as they should!
So I knew that both control heads were working correctly by installing it back to the 67 Eldorado and the other panel back to the 67 DeVille.
While the 67 Eldorado was perfectly fixed now with everything working as it should - the 67 DeVille was still giving me the problem with a non working “VENT“ position...
I studied the shop manual for hours and could not find what the problem could be. I knew that the power servo was working perfectly now and I knew that the control head was in perfectly working order as well. I verified this once again by switching these parts between the cars once again and everything worked as it should in the Eldorado but not in the DeVille.. I´m really good in switching these parts between my cars now ;-)
I started to look for electric connection problems and finally found out that no electricity was coming out of one of the three power servo connectors, but I did not know why...
After I removed the power servo once again to re-check it again it struck me - one of the pins was slightly bent and the wire connector did not make proper contact. This problem was not visible with the power servo installed in the car. It took me 2 long nights to find this little flaw... I just bent it straight and everything works as it should on both of my 67 Cadillacs. Now I have to recharge the systems and I should have perfectly working AC again... I will also install new dryers and a re-calibrated R134 POA valve before the recharge.
One the one hand the 1967 ACC is very complicated but once you know how it works its pretty easy to fix. The rotary valve in the power servo is pretty easy to refurbish, the dash servo valve is riveted together unfortunately, so its not such an easy fix, but NOS valves are still available at “Classic Auto Air“
*UPDATE 2022* - Check out this article and video as well as I had to repair my switch again in 2022 on my 66 DeVille!
Here is a video about the Master Switch that a gentleman posted on youtube
The 67 Eldorado in front of the garage after the AC system was fixed.
Up first was the radio. The Eldorado came with the original AM radio. When it was turned on nothing happened though... The power antenna worked flawlessly and the signal seeking feature worked as well, but it would not make any sound at all. So I assumed that the speakers were shot and got a new front and rear speaker from Greg Thompson from Turnswitch. They have exactly the same size as the original ones. Cadillac used 10 Ohm speakers for all their cars in 1967. I installed them today and the radio came back to life. As there are no AM stations around any longer I came across a great solution which would enable me to use an Ipod or Iphone to play over the original radio, without having to do any non original conversions to my car. Its a plug and play solution which can be undone in 2 minutes and does not involve any cutting or screwing. The product is called RediRad and it works perfectly. Just tune the radio to 1000 khz on the AM band and plug in the audio source and you can hear your favorite music on your original radio! It is simple and affordable and undetectable as its hidden under the dash.
I also tried to repair the broken stem on my clock and it took me a while to get the clock out only to find out that my replacement stem would not fit. So I had to reinstall it. But at least it seems that it has a better electrical connection to the printed circuit now and the clock works all the time now. Problem is that I can only set the time with long nose pliers at the moment. Looks like I will need an entire new clock or live with it the way it is now. At least it works...
It was great to spend some time with the car again after the long winter months!
The removed dash.
The RediRad system! Great stuff!
The replacement speaker on the left and the original one on the right.
The new speakers with the old one.
The Eldorado is coming close to the 28k mark... Still a low mileage car ;-)
The instructions on the reproduction part mentioned that one could use silicone spray to lube the internals of the actuator through the vacuum inlets - this would also make the rubber parts in there soft for a better sealing. So I thought it might be a good idea to spray something in my old part and really soak it...
I had the impression that the rod was easier to move after application. I also put some gasket sealant around the vacuum inlets, just to make sure that there is no leak anywhere.
So I installed the old unit once again and it still did not work properly - but it worked fine if I only installed one vacuum line at a time. Suddenly it rang a bell. There are some T-connectors which also act as a valve going to each actuator. They do vent the system on one side when the doors are operated.
I cleaned the connector valve and reinstalled one hose going there and suddenly everything was back in working order! It now works like it should again!
Looks like I bought the new actuator for nothing... It cant hurt to have a spare though, as they are pretty fragile and even failed when new in 1967... In the meantime I might also find a way to install the original rod ends... Let me know if you have an idea!
If you are looking for a vacuum diagram for the Eldorados headlight doors you can find it on my website.
on the left the original actuator - on the right the reproduction unit from a 1969 Camaro RS
The different rod ends - the original one on the left - the headlight door mechanism is installed in the center of the rod end with a pin.
On the Camaro unit one could probably install it on the side using a bushing.
I have heard that this worked fine for some Eldorado owners as you can see on the picture below.
This is how it worked for another Eldorado owner - he installed some bushings on the new unit.
I found this picture on ebay at the auction for a 1967 Eldorado recently.
Update November 2014:
I have been in contact with Mark Maromonte who found this post on my website and replaced his bad OEM actuator with the 69 Camaro RS unit. He did some modifications and sent me some pictures to share here. Thanks Mark! I´m sure its helpful to others as well:
Mark wrote (all pictures below were provided by © Mark Maromonte):
I bought an actuator for a 1969 Camaro RS. I removed the two pins that held the attachment to the end of the rod. Then I cut 3/8 of a inch of the rod off, so the rods were the same length. Then I beveled the end of the rod on a grinding wheel, for about a ½ inch at the end of the rod. This was done so that I could start a ¼ tap on the end of the rod. After the tap was done. I threaded on the Eldo clevis pin. Done! 20 minuets, $76 vs $245. Works fine. Thanks again for suggesting that in your post. Take care, Mark
The 1969 Camaro RS headlight actuator is slightly different from the original Cadillac actuator. It can be made to fit though.
The original Cadillac OEM actuator on top and the Camaro RS actuator below. You can see the difference on the mounting. Also the air outlet is slightly curved on the Camaro. There is a thread on the Cadillac actuator and a clevis pin on the Camaro rod end.
The original Cadillac OEM actuator on top and the Camaro RS actuator below. You can see the difference on the mounting. Also the air outlet is slightly curved on the Camaro. There is a thread on the Cadillac actuator and a clevis pin on the Camaro.
Mark beveled the end of the rod on a grinding wheel, for about a ½ inch at the end of the rod.
Mark cut a thread onto the Camaro shaft so that the original Cadillac clevis would fit.
Finished- works perfectly. The modification is done.
The right headlight door actuator also suddenly no longer works correctly. All hoses are new and it worked perfectly until recently. I can now only make it close if I jiggle on the actuator. Is there any way to rebuild them? A source for new or rebuilt ones? I have heard that the ones from the 1969 Camaro is very similar and only needs some minor modifications to work on the Eldorado as well. So I went ahead and ordered one. But the worst thing was that the freshly rebuilt carburetor made strange ticking noises and sounded like a tractor while accelerating. It worked well though, but the sound was unbearable. Could it be a defective gasket? It was also idling quite badly. Acceleration was superb though, its much more powerful than before, but still something was wrong... The ignition also was completely rebuilt. So I played around with the ignition first, but the ticking sound did not go away, no matter in which direction I changed the timing... Almost sounded like an exhaust leak, but there seemed to be none... It was LOUD! Before I had the carb and ignition rebuilt, it was extremely quiet and idling smoothly but had misses while accelerating.
I got some very valuable tips from fellow Cadillac aficionados and the previous owner of this Eldorado even called me from the USA to give me some tips to solve this issue, and he was spot on with his diagnosis...
With a hose held to my ear and the other end to the carburetor, I was able to locate the source of the noise. It came from the carburetor below the choke assembly. So I took the freshly rebuilt Rochester Quadrajet out again, only to find out that the gasket and the metal shim were installed the wrong way around. This burned a hole into the brand new gasket where the exhaust gases from the heat crossover passage could escape and make this noise.
Of course I did not have a new gasket at hand, so I carefully removed the old one from my spare engine, which was in pretty good shape and installed it.
No more ticking - no more noises, no more bad idling.
The car now drives amazingly good and is silky smooth. It could not be any better.
The shim was installed first and then the carb - thats wrong! The gasket has to go on the intake manifold first - then comes the metal shim.
Here you can see the burnt gasket and the metal shim
Putting everything back together again
Test drive after the repair - perfect!
There are only very few possibilities why this could have happened.
- The thermostat did no longer open
- The waterpump failed
- Air was trapped somewhere in the cooling system
So I removed the thermostat housing first to check the thermostat. This is when disaster struck. The two bolts in the thermostat housing snapped off immediately when I tried to unscrew them. *Cr*p”
I then removed the thermostat and put it into boiling water and it worked perfectly. So I think I can rule out the thermostat.
As the upper radiator hose stayed pretty cool and it did not feel like there is any coolant circulating through it, I suspected the water pump. Maybe the impeller does no longer work. I will have to remove the pump to check it.
My friend Richard came over to help me to try removing the broken bolts which got stuck in the cylinder head water outlet pipe. As all methods we tried to remove the broken bolts failed, we began drilling the remains out. This did not turn out very successful either... The threads also got damaged with this method. Of course one could now rethread this part, but I decided to order a good used one.
Once again Arizona Vintage Parts is the company where I ordered all the spare parts. They are really a great company! They are reasonably priced and so far they had everything I ever needed and inquired for. They are a pleasure to deal with and I can highly recommend them. I´m looking forward for the parts to arrive, as the car in its current state is immobile and blocking the garage...
UPDATE 03/09: The parts from Arizona Vintage parts already arrived within a couple of days after ordering! Wow thats fast! Now I need some time and warmer temperatures to install them...
My friend Richard drilling out the snapped off bolts...
Normally the thermostat is in there. You can see the mounting holes from where we drilled out the bolts. Unfortunately the threads did not survive this treatment...
I removed it from under the seat, what was a little tricky and involved getting in some strange positions to access all the screws. It would be easier if one removes the seat from the car, but thats a rather unpleasant work as well...
Eventually it came out of the car. I disassembled it and at first everything looked pretty good, but it soon showed that the old grease became rather hard and sticky and one of the three solenoids was no longer able to push the gear into a locked position.
I thoroughly removed all of the old grease and re-greased everything with white lithium grease. I then reassembled everything, reconnected the gear cables, reinstalled the transmission under the seat (thats a very tricky part...) and everything worked like new!
I now have perfectly working power seats again!
This is how the doorjamb switch looks like on a 1967 Eldorado when removed. Sorry for the crappy cell phone picture!
I will have to clean the paint in the doorjambs soon as you can see in this picture...
While I had the 67 Eldorado out I also turned on the headlights and was once again annoyed by the fact that the right one opened simultaneously, but closed slightly slower than the left one when I turned the lights off. There was a difference of around 1 second in movement between the two headlight doors.
Being a perfectionist I could not stand this, so I began searching for the problem. I already had spent some time in the past trying to fix this, but I did not succeed. The system is driven by vacuum only, so I started to look through the vacuum hoses once again. I had already exchanged a couple of them last year. I found another two brittle ones going through the firewall to the headlight switch from where a slight hissing sound was coming when the lights were on. When I touched them the hissing would become even more noticeable. I then tried to press them onto the connector of the switch and the first hose began to crumble into pieces. So I replaced all the hoses on the switch and rerouted them through firewall through the rubber insulation. There are three hoses . One is the vacuum feed (the one in the middle - I think it was yellow), one is for opening the doors (green) and one for closing (red). I also replaced the red hose behind the firewall going to a T-connector from where the vacuum is fed to the headlight door actuators. I had already replaced the two hoses after the T-connector in the past. With all new hoses in place the doors now perform almost simultaneously and quite fast. So when you run into troubles with your headlight doors, check and replace all the according vacuum hoses first. Its amazing how brittle the hoses going to the headlight switch inside the car can become over the years. It looks like they used a quite different material for these three hoses, as all other vacuum hoses are in much better shape and do not show any sign of deterioration at all.
You can see a video of the headlight doors in action below. On this video they are slightly out of sync. As it looks like they are slightly different every day, depending on temperature and engine idle...
watch on youtube or below
While the Eldorados were outside the garage my wife used the opportunity to shoot a couple of pictures she had in her mind, which she is planning to hang into the kids room. Cant wait until the medium format film is back from the photo lab. Below you can see only some digital snap shots I took.
Despite the last two unusual warm and beautiful days unfortunately winter is not over yet here in Austria, as some more snow is predicted for next week and the cars are back in the garage desperately waiting for April to come...
The Eldorado is enjoying some sun rays for the first time this year
Although she is 7 months pregnant, my wife Afra is still climbing ladders to get the best angle for her shots...
The two Eldorados in front of the garage where the snow has just melted away.
Below you can find some pictures of the now clean engine bay.
I suspected a vacuum leak somewhere in the system. Troubleshooting began with going through all the vacuum hoses. I replaced some which were a little worn out at the connectors. I also cut off the ends of most hoses, as they were all becoming a little loose during the last 40 years. I then plugged them in again.
Not much did change though.
When I came to the hose of the hot water valve and the delay relay, I had the first success. At least the blower motor would stay on in all “Auto” modes, even when the car was idling - but would still go off in “Fog” and “Ice”. I then suspected a leak in the power servo or in the dash controller. So I installed the power servo from my 67 DeVille where everything works perfectly, to be able to rule out any problems. Nothing changed though - the blower would still come on and off depending on the throttle position.
I then soon found the culprit of the whole issue - it was the master vacuum switch - which seems to have a problem with the internal electric switch. As I had a spare one around I installed it - and voilá - everything worked as it should. It always looked good when I checked it before.
I´m very happy that everything is back in working order. The only thing which I still have to repair is the fast idle diaphragm which completely dried out and is no longer functioning. Fortunately I do have a spare 429 engine in the garage from where I can grab and use this part - so I will repair it soon.
I then need a new condenser which is already on the way across the Atlantic coming from Old Auto Air.
By the way - Cadillactim has an excellent trouble shooting guide for the ACC on his website.
The evaporator had to be replaced as well along with the heater core. This is a pretty big task as you can see on the pictures below. You even have to remove the hood to get access to the whole unit. The fiberglass AC enclosure had to be repaired at my car as well as the previous owner tried to repair the evaporator and missed a screw and made a tear into the enclosure. The restoration shop repaired this professionally and it looks like new now.
The best troubleshooting guide for 1967 and 1968 Cadillac´s Automatic Climate Control Systems I got today from Gary Sisk - owner of a 1968 Cadillac.
This is a very easy to follow explanation which will save you a lot of time and you do not even need any special tools.
It was written by Lynn Nicholls and can be found on Stampies Cadillac page - here is the direct link to it.
Below you can find some pictures of my system:
The whole AC unit has to be removed to get access to the evaporator and heater core... The slight surface rust that showed up where the gaskets were, was removed as well of course...
The big hole on the left is where the blower motor is installed.
This is where the AC box usually is installed
You can see how much has be removed just to get to the evaporator and heater core...
I discovered the first issue at the hot water valve
The hoses around the time relay delay were leaking a little bit
For testing purposes I hung a spare master vacuum switch into the car - this solved the problem
The old fast idle diaphragm was leaking and brittle and was replaced with a better one...
The 1967 Cadillac Automatic Climate Control Vacuum Schematic from the shop manual -
1968 is almost identical BTW... Click on the image for a larger view!
Here is a video about the Master Switch that a gentleman posted on youtube
During the rebuild of the whole AC system I found out that I´m also having a little issue with the blower which does not always come on at full heat. So as a first step I started to go through the numerous vacuum hoses in the car yesterday. I soon found some old and brittle ones which fell apart when I just touched them. The two hoses that fell apart were the ones going to the right headlight doors.
Original color coded hoses seem no longer available anywhere. Thats why I had to buy regular black ones and paint the red and green stripes on them. Looks almost perfect - I did not think that it would turn out this nice.
Will go through the rest of the hoses soon. With the replaced hoses the headlight doors now work 100% simultaneously, whereas before one was slower.
I still have to find the issue with the blower motor - but I now suspect either the AC controller or the power servo. It works perfectly in full cold - only when I set a higher temperature the blower will cut out. Another problem to solve over the winter... I had almost the same problem with the 67 DeVille before which I could successfully repair.
BTW - if you know of any source for the GM OEM style color coded vacuum hoses please let me know.
You can find a vacuum diagram for the headlight doors here!
There are lots and lots of vacuum hoses in the Eldorado to check - here are only a few going to the storage tanks...
I will also give them a good cleaning during the winter.
The new hose with the painted red stripe is already in place - looks some kind of original...
I also got a new control valve for the ALC compressor from Arizona Vintage Parts (a company I highly recommend). With this new valve the ALC is back in working order and the car is now raising its rear to the correct riding height again.
the new original style spring clamp battery cables
a new used ALC control valve is also in place.
Glen wrote the following:
“If you take the panel under the steering column off I think you can reach up and disconnect the connector from the light switch. Or you maybe able to get a meter probe up there to check voltage. The battery connection to the switch for the headlights is on the 14 gauge yellow wire. This only supplies the headlights and front parking lights. If you have 12 volts there then your problem is in the switch. There is a circuit breaker in the switch and it may be bad or the contacts in the switch are bad. IIRC these switches have a vacuum switch on the side that operates the headlight doors. This makes them hard to find. They do not interchange with the 68 Eldorado because in 67 the parking lights only come on when the switch is pulled out to the first position while in 68 the parking lights come on with the headlights also. If you do not have voltage on the yellow wire then you should check the fusible link on the starter. It is an 18 gauge dark green wire that changes to a 14 gauge red with white tracer before it gets to the connector. Check for 12 volts at the connector and check the contacts in the connector. “
Glen was spot on with his diagnose and it turned out that the green 18 gauge fusible link was the culprit for my headlight problem as it came apart for unknown reasons.
As a follow-up Glen recommended the following:
“You might want to look closely at the break in the link. See if it is melted or did was it broken by mechanical means. If it was just pulled apart or cut then you have to check what caused that. To trouble shoot this if it was actually melted due to over current, I would unplug the headlights and front parking lights, and temporarily connect a headlight or other big light bulb, in place of the fusible link. You can then try things without blowing fuses. With the troubleshooting light in place it will light up brightly if there is a direct short. With the headlights and front parking lights disconnected the test light should not light up at all under any condition. You should be able to move change the position of the headlight switch, switch from high to low beam (light switch in the headlight position); wiggle the wire harness anywhere and not light up the test light. If it does you have found the short.”
I did this procedure today but it did not show any shorts. I then reconnected the front lights and everything did work again. I will now have to find a replacement fusible link which is very uncommon over here in Europe. I will replace it together with the positive battery cable where the clamp is almost falling apart. I hope the issue wont come back. It looks like the fusible link maybe only fell apart due to age as it did not show any signs of burning. Its located very close to the starter and the exhaust manifold - so maybe 42 years of dirt and heat just made it crumble into pieces....
the completely removed positive battery cable harness
the original battery clamp - its already missing the spring part
The starting circuit diagram is showing the battery cables - Click for larger picture!
The Iginition and Starter Circuit Diagram for the Eldorado (693) and the other Cadillacs of 1967.
Click for larger version!
When I arrived there the headlights did no longer work. They did not have any problem before.
When the inspector wanted to turn them on - the headlight doors did open but the lights did not come on.
Also the parking lights and high beams do no longer work. The taillights did come on though and the cornering lights and turn signal do work as well.
Very strange… Checking the fuse panel I found out that there is no fuse for the headlights. My guess is now that it must be the headlight switch - can this be repaired? The shop manual mentions a 25amp circuit breaker in the switch but it does not mention how to repair it or check it.
The other thing which stopped working yesterday was the Automatic Level Control. The vacuum operated compressor in the engine bay seems to work as I can hear a ticking noise, but the car does not raise. I also added some pressure (100psi) to the service valve at the compressor but the rear of the car did not raise at all. When I depressurized the compressor the car did not come down any further either. Very strange… I really need to get this fixed - non working parts are making me crazy!
The car lost the yellow plastic cap which is located on the top of the regulator valve while driving it into the shop. Unfortunately it landed directly below one of the tires and was crushed to tiny little pieces. I will have to try to find a replacement. I have no idea how this could have come loose.
The car did not pass the inspection for some other reasons as well , like a sticky front disc brake, worn ball joints and pitman arm and some other minor things . It will keep me busy repairing all this for a while. Whats worrying me most is the headlights and the ALC as I do not have any clue at all.
On the positive side - the car was a pleasure to drive the 60 miles to the shop - its so much different to the “regular” Cadillacs - Big, silent and powerful and no big boat ride ;-)
in the shop
Today my wife helped me trying to replace it. It is always a pain to get the old radios out, as the electrical connectors are pretty hard to reach if you have big hands like me... After some fiddling and lots of bad cursing, the radio eventually came out. During this procedure I found out that somebody messed around with the speaker cables which go to the rear speakers and installed new ones - which were connected directly to the front speaker. They cut the wire going to the front speakers and spliced in the rear speakers. Not very well done...
When I finally managed to install the “new” AM/FM radio I found out that it does not fit at all... It either comes from a 66 or a 69 Cadillac?
So I installed the old AM radio coming from my convertible where I did the same procedure 2 years ago - only to find out that non of the 2 speakers seem to work anyways...
I now have to find a good used 1967 AM/FM radio and 2 speakers - the list of things I need is getting longer everyday. I will also have to repair the wiring of the rear speaker back to original.
Thanks to my wife Afra for helping me!
removing the dash
the removed dash
removing the radio buttons was the easiest part
Afra repairing the wiring of the old radio
UPDATE 2010: In the meantime (since 2009) the Boyne switches they are getting reproduced and show up on ebay all the time. Also OPGI shows them in their Cadillac catalog. Its harder to find one for a T&T column as they are not getting reproduced so far. I do not know where one could find a switch for T&T though. If you know of any resource for T&T switches please let me know, I would love to have a spare one for my Eldorado!
When I was looking for a switch for my 1967 Deville, I only investigated resources for cars without T&T columns and this is what I found out:
According to the 1971 parts manual there are two different ones for standard column cars and one for T & T
- 1967 - 1968 (Exc. T & T) Part # 7800483 - Switch, w/wiring harness (Delco-Remy)
- 1967 - 1968 (Exc. T & T) Part # 7805675 - Switch, w/wiring harness (Boyne Products)
- 1967 - 1968 (T &T) Part # 7805676 - Switch, w/wiring harness (Hazard warning switch an integral part)
The two different standard column switches can be identified without removal as the parts manual describes:
„Hazard warning switch is an integral part. Switches can be identified before disassembly as follows: The Delco Remy switch has a square hole for the hazard warning switch in the cover, the Boyne Products switch has a round hole for the hazard warning switch in the cover.“
The problem with the switch on my standard column DeVille was that the return cancel cam broke, and that non of the repair kits were available for the Boyne switch.
Replacing this switch in the steering column is quite a pain - below you can find the instructions from the shop manual on how to do it.
There is also a revised procedure for a much easier installation below in the “Cadillac Serviceman" from August 1967!
The Cadillac Serviceman from August 1967 shows a revised procedure for a much easier installation of the switch.
If you need the shop manual instructions for a tilt and telescope column click here! Or just use the procedure above!
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Website News (30)
- 6 way power seat
- 10 Ohm
- 1958 Cadillac Eldorado Seville
- 1958 Cadillac Repair Tip
- 1959 Cadillac Eldorado Seville
- 1966 Cadillac Coupe deVille
- 1966 Cadillac Repair Tips
- 1967 Cadillac DeVille
- 1967 Cadillac Eldorado Repair Tip
- 1967 Cadillac Repair Tip
- 1967 Eldorado
- 1970 Cadillac Eldorado
- 1971 Lincoln Continental Mark III
- 1974 Cadillac Coupe DeVille
- 1974 Cadillac Repair Tip
- 1978 Cadillac Eldorado Biarritz
- 1978 Cadillac Repair Tip
- 1980 Cadillac Eldorado Biarritz
- AC Compressor
- AC Electrical Diagram
- Accelerator Pump
- Accelorator pump
- Adriatic Blue Metallic
- Air Pump
- Anti Rattle Clips
- Antique Gold
- Arizona Vintage Parts
- Ash Tray removal
- Atlantis Blue Firemist
- Austro Classic
- Autolite SP-459
- Automatic Seat Back Release
- Barn Find
- Battery Tray
- Beach Race
- Bill Hirsch Engine Enamel
- Bleeder Screws
- Brake Booster
- Brake Fluid
- Brake Gray
- Broken Bolt
- Bucket seats
- Bumper End
- Cadillac BIG Meet
- Cadillac BIG Meet
- Cadillac birthday cake
- Cadillac Blue
- Cadillac Color Selections Dealer Book
- Cadillac Coupe deVille
- Cadillac Dealer
- Cadillac Meeting
- Cadillac Mini Meeting
- Camaro RS
- Car Show
- Carter AFB
- Cavalry Twill Vinyl
- Citizens Band
- Classic Cadillac Club Deutschland
- Clay Towel
- Clutch Coil
- Colonial Yellow
- Color Coded Springs
- Continental Mark III
- Control Head
- Convertible top
- Cruise Control
- CV Boots
- CV JOINTS
- Dash Trim
- Decal Removal
- Delco Moraine
- Der Standard
- Diagnosis Chart
- Digital Rotary Drum Clock
- Disc Brakes
- Diverter Valve
- Door Jamb Switch
- Drive Shaft
- Driving tour
- Drum brakes
- Dry Ice Blasting
- Dry Ice Cleaning
- Electric Choke Thermostat
- Electrical schematic
- Engine Bay
- Epoxy floor
- Factory Markings
- Fender Skirt
- For Sale
- Front AXLE
- Front brakes
- Front bumper filler
- Front Floor
- Front wheel bearing
- Fuel Filter
- Fuel Pump
- Fuel Sending Unit
- Fusible Link
- Garage Cabinets
- Gear indicator
- General Time
- Glove box light
- Grand European
- Haus of Hot Rod
- Headlight Actuator
- Headlight doors
- Heater Core
- Heater Hose
- Heater Valve
- High Idle
- Honest John
- Hood Emblem
- Hood Ornament
- Hose Clamp
- Hot Choke
- Hot Water Valve
- How to
- Ignition Diagram
- Illuminated Entry
- John D‘Agostino
- John Foust
- Klassikwelt Bodensee
- Leather seats
- Light Switch
- Lincoln Mark III Repair Tip
- Low Mileage
- Marilyn Monroe
- Mark III
- Master Cylinder
- Master Switch
- Master Vacuum Switch
- Media Blasting
- MK II
- Mopar Nationals
- Mostkost Kustom
- Oberösterreicher des Tages
- Paint correction
- Part Number
- Patch Panel
- Perfect Circle
- Persian Lime
- Photo shooting
- POA Valve
- Power Antenna
- Power Servo
- Power Vent Windows
- Printed Circuit Board
- Quarter Panel
- Quartz Conversion
- Rear brakes
- Reed Switch
- Removing Overspray
- Rocker Arm Cover
- Rocker Panel Extension Clips
- Rotary Valve
- Rust removal
- Rust removal gel
- Sabre Wheels
- Sand Blasting
- Season Greetings
- Seasons Greetings
- Seat Back Locks
- Seat Padding
- Seat Transmission
- See through ornament
- Self adjusters
- Sepp's Garage
- shop manual
- Spark Plug Wire Routing
- Special Award
- Speed Bleeder Screws
- Splash Guard
- Starter Diagram
- Starter Motor
- Steering Column
- suction throttling valve
- Swirl Mark removal
- Taillight Cover
- Texan´s Choice Award
- Tilt and Telescope
- Time capsule
- Torque Specifications
- Tower Hose Clamp
- transmission control selector
- transmission control selector indicator light
- transmission shift indicator
- Treadle Vac
- Trunk Cardboard Kit
- Trunk lining
- Trunk to bumper cover
- Turn Signal Switch
- Ultimate Garage
- Undercoating Removal
- Vacuum Booster
- Vacuum diagram
- Vacuum hoses
- Vacuum Master Switch
- Vacuum Schematic
- Vacuum Valve
- Valve Cover
- Vent Window Switch
- Vicodec roof
- Vinyl Roof
- Washer Fluid Float
- Washer Fluid Low Level Indicator
- Water Pump
- Website News
- Wheel Bearings
- Wheel Housing
- Wiring Diagram