Question about 1989 Cadillac Sedan DeVille

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My cadillac deville keeps getting oil in the radiator. can you tell me what the problem maybe. Is there a repair manual(free) that i can get. Its a 1989 Cadillac Deville

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First check which oil level is missing motor or trans. There is a cooling pipe inside the radiator that splits ,the oil from the trans,flows through it and leaks into the water (new radiator).
The motor can leak oil into the water through a blown head gasket or loose head bolts.

Posted on Mar 13, 2016

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  • Master
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You may be getting it from the oil or trans. cooler in the radiator. Get a donor radiator from pullapart.

Posted on Apr 02, 2011

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Posted on Jan 02, 2017

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My 1999 cadillac deville keep running hot, i have replace raditor, this car still running hot


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I have a 97 cadillac deville, Not looking good.


I pretty much have the same situation, in doing research, I found out the the treads in the block tha thold the head on are possible poulling out of the block, there is a fix called Time cert it's best to pull the engine I'm told and remove the head or heads and install the time cert's, it comes with a drill guide, after drilling you instal the treaded time cert, replace the head bolts and reassemble the engine.
I did not do this I have ran block sealer and bought a new Delphi Radiator, I haven't completed running the third block sealer and I'm waitng to install theradiator until I finsh that. I dont' want to run block sealer through the new Radiator, so I hope to finish that today and if it runs cool I will install the radiator and the anti Freeze. Good Luck

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hello i have a 1998 cadillac deville course. an i been having the same over heating problems with mine i been taking it to mechanics an no one seems to know even the caddy dealship its overheating i checked the termostat water pump radiator all hoses was wondring could you tell me what you did or what you are doing to fix your problems my email is teree1234@yahoo.com thank you very much

Aug 02, 2008 | 1999 Cadillac DeVille

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