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  #1  
Old 04-14-2004, 04:50 AM
thevegmyster
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If everything under the dash is oil soaked...

What would you replace?
I found the IP shutoff was bad, that goes in first.
The ignition switch is leaking oil!- hope I can clean that.
Stereo soaked!- thats last...
Are those big white pods under the dash the "servos" I see reference to? Where do you get those?
Anything I am forgetting?
thanks

'80 300CD,
non-turbo, but GOES!

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  #2  
Old 04-14-2004, 05:25 AM
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Find the source of the oil. It's wither the Injection pump shutoff or the vacuum pump. Determine the culprit and correct it. Under the dash you can get the oil going through the Ac vacuum system. The Ac vacuum system has a couple od vacuum elements to move the flaps in the heater box. You will have to clean them out as well as the lines. The oil may be in the AC control knob units. I can't remember the 80 setup. push buttons or dials?? but either system will have to be flushed. How successful flushing will be is up for grabs.
The other vacuum goin into the cab is the door lock vacuum. All vacuum lines go through the firewall just to the inside of the brake booster in the engine compartment. check those out. If frull of oil then you will have to go through each system inside the car. AC vacuum, ignition key shutoff and door lock system.
As I sid first find the leak and repair it. Install clear filter in the line form the IP shutoff unit as well as the lines comming off the vacuum pump to booster line. This will help you in the future.
With the oil in the vacuum elements expect to replace all the units. they are made of a rubber diphram that the oil will destroy and so just plan on replacing them.

Dave

the link for the service manual

http://skinnerbox.steaky.org/123_DISK2/program/123-cd-index.html


Look up
Door locks
Injection pump shutoff
Ac system vacuum elements
Brake booster
transmission vacuum
EGR vacuum
Injection pump vacuum
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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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  #3  
Old 04-14-2004, 07:45 AM
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Other source of oil under the dash is the mechanical oil presure gauge. On mine it is slowly filling my gauge pod and leaking everywhere else. One of these days I gotta fix that!
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  #4  
Old 04-14-2004, 10:57 AM
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Anyone that has oil leaking under their dash really needs to get it fixed. Our 240D had apparently been leaking some oil for a while, and we didn't know about it. Well, come one day, my wife went to start up the car and there was quite the little electrical dash fire. The fire department came over and all that. Anyway, there wasn't any real lasting damage to the car. We had to replace a couple of scorched instruments, but it could have been a lot worse. Don't let this slide, that's my advice.
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  #5  
Old 04-14-2004, 02:33 PM
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it is defineately the oil pressure gauge. this is quite a common failure on these cars. i would expect if was vacuum related than you would be experiencing many other problems similtaniously.

to determine whether it is the oil gauge remove the instrument cluster and look for signs of oil in and around the cluster and specificly by the live oil input line to the gauge. if this is the culprit i think you need to replace that whole left cluster, but im not sure. i got one from the junkyard for $20....

jusst remember not to start the car with the cluster oil, or else you will be cleaning up ALOT more oil.

good luck
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2004 Saab 9-5 AERO 138k (for sale)
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  #6  
Old 04-14-2004, 02:59 PM
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Yes, it could be the oil pressure guage or oil line. But when he said "the radio was covered", I assumed the vacuum actuators above the radio which would be of course in the vacuum system. Now that does not mean the oil did not drip down to the radio.

thevegmyster
check the oil line for cracks or improper fitting into the guage. Also it could be the gauge or chaffing where the line enters the firewall. If these are fine then its the vacuum system.

Dave
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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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  #7  
Old 04-14-2004, 03:25 PM
thevegmyster
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I should have mentioned that it is not, for sure, the oil pressure guage. I pulled the cluster and it is clean.
I suspect it came from the IP shutoff valve.
From what I hear it sounds like the dash needs to come apart.
Good Grief, replacing all the elements sounds expensive.
Seems hard to find my particular year in parts and diagrams...


'80 300CD
non-turbo, but GOES!!!
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  #8  
Old 04-15-2004, 02:17 AM
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The previous owner changed out the key-lock, possibly (probably) because of oil in the shutoff valve right behind the lock set. When I was working on the radio and the ACC which were having problems, found oil had traveled down via the cabled wires and had soaked a lot of the items in the center of the console. No evidence of any current leaks or new oil, just a mess that had not been cleaned up adequately by the PO.
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  #9  
Old 04-15-2004, 05:41 AM
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Its not a terribly difficult job to remove the dash. but I dont think your at that stage yet.
Pull the instrument cluster and check the oil pressure guage AND LINE. This is a easy job. You can push the dash out from behind if your not sure about making a tool to pull the dash. While the instrument cluster is out, look at the igition switch and make sure its ok. Visually inspect the lines going to and from the ignition switch shutoff unit.
Then move onto the door vacuum system. This will be checked in the engine compartment. Disconnect the lines going into the passenger compartment and look for oil. Then go down to the driver floor. Pull the carpet and pad and check the vacuum connections there. I doubt that your dor system is the problem. The lines do not go to the dash center section. But if they are oil filled then you go back into the engine compartment for your oil source. By the way have you found the source of the oil yet?

For the AC system, your year, 1980, vacuum elements can be rebuilt for $5.00 per unit from George Murphy at Performance analysis company, 865-482-9175. He sells the diapram that you will use to rebuild the element. This will keep the cost down. also you only have 2 elements in the AC system If I recall correctly. The fresh air unit which is acessable through the glove box and the floor unit which is acessable from below the dash on the passenger side.
You will probably pull the center consol units, to access the AC control units. Your not pulling the consol just the ashtray, radio and ac panel. This should give you plenty of access to clean everything and replace what is necessary.

Review the manual and go at it systematically. Post any questions that you may have

Dave
__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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  #10  
Old 04-15-2004, 09:55 AM
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I doubt you're at the extreme

On my 1980 when I first got it I found oil on top of the radio. it was the IP shutoff that was leaching oil back up the key switch which in turn had some really bad rubber connections and it was these connections that were leaking. I couldn't believe it worked all the way across to the top of the radio. I just replaced the rubber connections and the shutoff valve (with a used one) and no problems ever since.
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'85 300SD Silver - Sold
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  #11  
Old 04-15-2004, 03:49 PM
thevegmyster
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I sure appreciate all the replies,
You folks have a great forum here.
Fisherman, my IP shutoff is bad for sure.
And the oil does appear to originate at the ignition switch.
If my problem is as easy to solve as yours, I will be delighted.
Did you try to clean out your lines?
I am concerned of removing everything to spray out lines and mixing up that labyrinth of vacuum lines...
And I have yet to see a diagram which accurately represents my particular system.

'80 300CD Euro
non-turbo, but GOES!
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  #12  
Old 04-15-2004, 06:35 PM
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Personally I didn't...

But then I may not have done the perfect job of fixing either. It has worked well for a two year but then one day something may die in it.
I don't think mine was that extensive as you have to remember that the oil would have to pulled all the way from the shutoff, through the key switch, down to a junction in the engine compartment and then work it's way back up the lines into the acc system. Pull your couplers in the engine compartment where the shutoff line ties in (brown I believe) and see if you have signs of oil in the vacuum lines there. If so then the damage may be more extensive but if not I would think you would be okay just fixing the leak and moving on. My opinion of course and it is worth what it cost you...
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'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique
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  #13  
Old 05-20-2010, 12:28 AM
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Quote:
Originally Posted by whunter View Post
for new members
HOW do you remember these old threads?
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Links:
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  #14  
Old 05-21-2010, 01:21 PM
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Hmmm

Quote:
Originally Posted by daw_two View Post
HOW do you remember these old threads?
Massive technical memory.

But I forget my name at times..

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