Question about 1992 Cadillac DeVille

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1992 Cadillac Sedan deVille with 165k. Coolant temp light came on. Checked t-stat and found it to only open partially. Ran engine without t-stat and the coolant temp light came on again. I don't belie

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  • Cadillac Master
  • 942 Answers

I believe you are correct - the radiator is probably plugged, but you should also check the water pump.

Posted on Apr 18, 2017

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Posted on Jan 02, 2017

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  • 74 Answers

SOURCE: 94 4.6 deville coolant hot,eng hot ,limp mode

pull codes from on board diagnostics turn key on not running press and hold hot button on temp and off at same time till dash lights up write down codes respond with all computer codes i will help you determine prodlem and try to fix

Posted on Aug 26, 2008

SOURCE: 1993 cadillac sedan deville security

take the fuse it is a 30 out , its near the battery happened to me this morning.good luck

Posted on Sep 12, 2008

  • 4 Answers

SOURCE: how to reset oil life

To reset the engine oil life, do this: push info button till oil life comes up, then push inforeset, to reset to 100%


To reset the transaxle oil life do this: early models; press off and rear defrog button simultaneously.
later models; press info till the oil message shows up then, press and hold info reset.


Some models have both, but my 94 Deville only monitors the transaxle

Posted on Oct 07, 2008

emissionwiz
  • 84625 Answers

SOURCE: 63 cadillac sedan deville heater core removal and installation instructions

I do think you have to pull he dash, for that you will need a manusl, try ebay for used factory manuals, I have had good luck getting them there for all my cars.

Posted on Oct 17, 2008

  • 86 Answers

SOURCE: 1992 Cadillac Sedan Deville power steering leak

Replacement reservoir o-rings are available to correct the problem

Posted on Apr 25, 2009

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1 Answer

What is the safe coolant temp in a 1989 Cadillac Eldorado


225-230 deg F is what the Caddy forum says. 250 F can be tolerated briefly when towing, going up a mountain etc.

http://www.cadillacforums.com/forums/northstar-engines-system-technical-discussion/11308-coolant-temp.html

Mar 11, 2014 | 1988 Cadillac Sedan DeVille

1 Answer

Failed ect sensor thermostat reading over 270f


It means you should try replacing the engine coolant temperature sensor as it has probably failed (it's located on the driver's end of the engine at the middle about half way down).

Jan 25, 2018 | 1996 Cadillac DeVille

1 Answer

After many miles the coolent temp light is on


The coolant light tells you are low of coolant, so have you checked to make sure that you have enough coolant - between the two marks on the radiator overflow reservoir? If not add and then keep a close eye on the ground under your car for the next few days to make sure that you are not leaking any out.

And if you haven't replaced your pressure cap on your radiator in several years, you might want to consider that.

Aug 01, 2011 | 1989 Cadillac Sedan DeVille

1 Answer

I bought a thermostat from advance auto parts for my 1999 cadillac deville but I was told that it should only be bought from a cadillac dealership but I used it anyway. I put the thermostat on and the car...


Who did all this work?
Was the water pump bad?
Was the radiator, so clogged it could not be cleaned?

What diagnostics was done?

Is the car actually over heating? That is where you start

All that work may have been for not

When you removed the stat,the temp never went up,only the gauge,
can not run a veh without the stat, the temp sensor needs it in there

Is the exhaust converter partially blocked?
Is the engine running rich

Have the data looked at.

Nov 24, 2010 | 1999 Cadillac DeVille

3 Answers

1996 Cadillac Sedan Deville that overheats only when idling


The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.

Jun 05, 2010 | 1996 Cadillac DeVille

1 Answer

Coolant temp. raising. no coolant loss.


first with the car off and cool squeeze bottom radiator hose with your hand then do the top,this burps any air out of the system,of course have the cap open,if this doesnt solve the problem its your radiator cores are block as you speed up its trying to force coolant thru a blocked core and temperature rises,you can pull your raidiator and have it cored at a radiator shop,cheeper than buying new

Jul 07, 2008 | 1999 Cadillac DeVille

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