You need some special tools to disassemble the A6 AC compressor.
On the 74´s original AC compressor clutch the bearing was bad.
The compressor clutch removed. You can see the bad bearing inside which is normally sealed. Some balls were already missing.
The clutch with some remains of the bearings.
The clutch and pulley removed on the original compressor.
My friends Steve and Lucky at work. We also replaced all the O - rings.
Removing the pulley
Removing the pulley from the rebuilt compressor.
There is this one snap ring we just did not have the right tool for. The shop manual lists a special plier for this. After a lot of fiddling we got it out eventually…
The magnetic coils on the rebuilt and the original compressor
Lucky in action
Once the snap ring is out you can turn the coils terminals to the 11o´clock position or the 1 o clock position. On the 74 it has to be at the 10 o clock position, otherwise the connecting wires are too short.
Getting this snap ring out was the hardest part on this job, due to not having the right tool for it.
The terminal at the incorrect position at the rebuilt compressor.
We turned the terminal to the correct position.
We sandblasted the pulley while it was out of the car so that I can repaint it now. Note the original decal! All the available reproduction decals are totally incorrect for the 1974 Cadillacs. The reproduction decals all show the wrong amount of refrigerant! They are also different in many other details. The closest match of reproduction decals for 1974 are the ones from 1972 Cadillacs…
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 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.
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.
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
The first page of the article © "Der Standard"
Car is located in Florida!
Yes, thats the original mileage!!
As we had a dry winter day I took the cars out of the garage - they fired right up after some months of sleeping
The Mark III was moved to the back of the garage, so that I can start working on the other cars first
Little Elliot loves Daddy´s cars as well ;-)
Cruising through the scenic landscape of Austria looking down at a lake
The Mark III enjoying the last sun rays...
The whole family in the Lincoln - little Elliot is taking a nap as usual - nothing beats the soothing sound of the V8...
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.
“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.“
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“
Good morning Cadillacs - welcome to the 2011 season.
“ I have found quite a bit out from my research. I spoke with Christian Prechter, President owner of ASC West on the phone. He was brought over from Germany when he was 19 in 1966 to help his brother Heinz Prechter do installs at the ASC West location and stayed there doing custom installs when ASC opened the Southgate Factory in Michigan. He told me that he did over 50 1967 Eldorados that year for various Stars and VIPS. He recalled doing mine for William Morris and even told me what color it was without me volunteering it to him. He said it was the only Marina Blue one he did! I quizzed him several times in a cross examination method to make sure he was not just telling me what he thought I wanted to hear. He said he is 100% certain he did it personally as he was actually doing the installs himself back then. The conversation went like this: „Hi I am Mark Bristol from Tomball, TX sorry to bother you at your home residence. I have a 1967 Eldorado with a sunroof.Did you ever install any sunroofs in 1967 in Eldorados?“. Prechter, " I installed over 50 for people like Sinatra, Dean Martin, Sammy Davis Jr. and William Morris.“ „Wow that many?“ Prechter "Yes it was very popular that year." „The car I have was William Morris' car do you recall doing it?“Prechter, "I sure do it was the only Blue one I did that year" „So you did a Marina Blue one for William Morris. That was a long time ago and you remember specifically doing this car, that is incredible are you sure?“ Prechter "I am 100% certain I did it" „So your division didn't get sold off to Inalfa.“ Prechter "Yes, I kept the custom install portion ASC West as it is the most profitable segment."„How involved are you with the actual operation of the company?“ Prechter "ASC West is still doing custom installs daily and I personally over see the operation." „Christian, Thank you for your time, you have been very helpful in understanding how these sunroof Eldorados came to be.“ It was a fairly short conversation I'd say 3-5 minutes with a very revealing content. I intend to mail him a packet with a photograph of "Elle" to autograph and several pictures to review and a certificate of authenticity for him to sign. Hopefully he will take the few minutes it will take and return it to me in the mail. A former President of the Cadillac Lasalle Club lives here in Tomball. He was president from 2004-2008. He stated he has seen 2 sunroof cars in person mine would make number 3. So they are floating around out there somewhere 50+ of them. My rule of thumb is 10% left in any condition after 40 years. That would mean there are 2 more out there some where!!!“ Mark Bristol
Mark Bristols - Ultra rare 67 Eldorado with sunroof.
Thank you Mark for providing all this information! Mark allowed me to post his info here, to help other 67 Eldorado fans with what he found out. Some more pics of his car can be found here:
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 Eldo at the shop.
I took my little son with me to show him whats going on in the restoration shop.
Looking at so many cool cars made little Elliot very thirsty. Here he is having his milk in the shop.
At the photoshooting with the light meter
Afra giving her best to avoid any reflections in the chrome
the sun is setting
click on the image to see all the images from this shooting
click on the image to see all the images from this shooting
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.
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 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!
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...
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...
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.
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
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...
The 1967 Eldorado at the lift - the trunk is full of parts
Look how clean the 429 engine looks inside - it only has 27k miles on it - the valve covers will get a repaint and new gaskets will be installed
The radiator is out for re-coring
The left front disc brake is sticking a little - it will be completely overhauled as well soon.
Some of the parts - the old ball joints are out. New brake hoses and brake parts are waiting for installation.
New H4 headlights had to be installed as the original T3 headlights are not street legal in Austria
As I finally want to be able to drive the Eldorado on our roads, today I delivered the Eldorado to my restoration shop, where they will do some of the necessary conversions and repairs. They already helped me with my 67 Deville and the 58 Eldorado.
The Eldorado will now get a new radiator as the original one is leaking badly. Actually I will have the original one recored and repaired. The front disc brake will get an overhaul due to a partly sticking piston, together with all new brake hoses. The fuel line will be replaced as it started to leak as well. The lower ball joints and the idler arm will get exchanged along with some rubber bushings. Besides of this list of repairs the rear lights will be converted for the inspection.
After the Eldorado is back in perfectly working condition, the inspector will check the car and hopefully approve it... Unfortunately until all this will be done it will take some time, and the winter is just around the corner - so it will go right back in winter storage after this procedure.
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!
The Eldorado is lurking out of the garage
washing and brushing the original rubber floormats...
...they turned out as if they just left the factory - awesome - this Meguiars rubber treatment is more than fantastic!
Tayfun - wet cleaning the carpet and trunk - looks like new now as well - the low miles are showing on the interior pretty well
My buddy Tayfun polishing the hood
Tayfun at work
The hood´s paint came out really fine and smooth - unfortunately we ran out of time and could not finish the rest of the paint
This is how the engine bay of my 1967 Eldorado looked before cleaning - I will also have to install the new evaporator later, reinstall the blower motor, connect all the AC hoses and recharge the AC... lots of work ahead
The engine degreaser is pretty aggressive on the oily gunk and dirt.
the truck as it arrived
the 67 proudly rode on top...
the old Cadillacs watching the new one arrive...
after a quick foam bath
looking a little cleaner
yes - they all fit in...
nice sight in front of the original 1967 Cadillac banner
its narrow - but they do fit in
looking into the garage - nice view...
the mauve 69 was picked up by its new owner - a dealer in Austria - it will be for sale there soon. Its a really nice car which I would like to keep if my funds would allow it. Whoever will buy this car, will get a nice Cadillac in a stunning color combination!
the ship my 1967 Eldorado will sail on across the Atlantic Ocean