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...
seen from the roof top of the garage
most of my American cars in front of the
garage...
Sepp during a burn out with one of his
Hotrods
we took the 67 Eldorado to the show
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“
the 67 Eldorado in front of the garage
after the AC system was fixed.
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 and the original
one
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 -
this is a custom 1959
Eldorado Biarritz project - you can find
more info here!
Looking at so many cool cars made little
Elliot very thirsty. Here he is having his
milk in the shop.
My friend Tayfun polishing the paint
it took 7 steps for a smooth surface...
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´ve 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.
Our son Elliot on the way home from the
hospital in Cadillac style!
Elliot and his mum at the first visit in
the garage...
The Cadillac Mobile we made for his
crib...

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!
as I could not start the car we had to
winch it up onto the trailer
its pretty heavy...
almost up...
good bye!
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...
the seat transmission disassembled - you
can see the brownish old grease everywhere
part of the gear and the solenoids
the transmission part
the three solenoids
the cleaned and re-greased transmission
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 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.
as seen from the passenger side
from the front
from the left
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!
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...
these are the documents which now allow me
to register the car in Austria.
the 1967 Eldorado at the lift of American
Special Parts - 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 a re-core
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.
a new H4 headlight had to be installed as
the original T3 headlights are not street
legal in Austria
The 1967
Eldorado is now at the restoration shop -
here it is on the side of a nice low
mileage 1971 Lincoln Mark III.
As I finally want to be able to drive the
Eldorado on our roads, today I delivered
the Eldorado to my restoration job, 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.
the new original style spring clamp battery
cables
a new used ALC control valve is also in
place.
The first few parts that arrived - belts,
filters, gaskets, caliper repair kits,
dryer, pitman arm, air filter and some
other stuff....
the green wire once was a fusible link - it
fell into pieces when I slightly pulled on
it
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!
in the shop at American
Special Parts in Wels

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
removing the dash
the removed dash
removing the radio buttons was the easiest
part
Afra repairing the wiring of the old radio
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...
finally unloaded
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