Question about 1996 Cadillac DeVille

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1996 Cadillac Deville -car shows that it is overheating, a/c blows hot -took the car to 3 different shops - 2 said its the heads - 1 said its the fan blowing a fuse causing the fan not to cut on when needed

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If its overheating, first check water level in radiator ( i assume youve done that).. next most likely, check thermostat located inside upper radiator hose where it mounts on front of motor... replace the thermostat ( a few bucks) being careful to reinstall the same direction as the original one... see if this corrects the over heating.

Posted on Mar 25, 2011

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Posted on Jan 02, 2017

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I have a 93 Cadillac Deville when I turn on the heat it blows a 10 amp fuse and the transmission stops changing gears. What is wrong?


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Jan 10, 2016 | 1993 Cadillac DeVille

1 Answer

My 1996 cadillac deville keeps running hot, I have changed the thermostat and had the cooling housing gasket changed but it still runs hot not all the time.


Do you have the Northstar engine? If so, there is an issue with head bolts pulling threads. Clues are periodic overheating. Look for exhaust in the cooling system. What happens is under load the compression gases push coolant out, and then you get overheat.
Pressure test the cooling system, there is a small hose that runs from the engine to the coolant tank, sometimes that plugs and air gets trapped. Some models suffer water pump impeller failure, easy to check with a special removal tool.
The head bolt issue is EXTREMELY expensive to fix correctly. Essentially you need to time-sert the bolt holes, and to do that you need to give a bare block to the machine shop.... Real bummer as the repair typically exceeds what is reasonable to invest in the vehicle, thereby rendering the vehicle useless.
I did repair mine, because I really liked the car.This issue should not happen.

Jun 05, 2011 | 1996 Cadillac DeVille

2 Answers

Why my ac in my cadillac deville 1996 blows hot air?


If your low on freon then the A/C wont come on? for a 1996 you will need to get it serviced if you havent its normal to loose 10% freon a year,

May 06, 2011 | 1996 Cadillac DeVille

1 Answer

2000 cadillac northstar running hot


I just had to rebuild my wife's Northstar. You have a bad head gasket. Her's was doing the same thing, and not showing traditional signs of head gasket problem. (IE: white smoke) It was just overheating with normal use.

Aug 22, 2010 | 2000 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

1994 Cadillac DeVille is running rough upon start and blowing smoke (oil?) I am thinking probably a head gasket or cracked head?


To pin point a blowing headgasket you will need
1)coolant system compression tester
or
2)chemical reaction test for combustion test gas
If it's the org. engine from 1994,with over 150,000 then blown headgasket is a good possiblity.
Tow it to the shop and let the pro to do the coolant pressure test and combustion gas test.
A full head gasket job with head re-surface (if it can be re-use) is worth it.
Shop around on well estiblished independent shops.

Aug 12, 2009 | 1994 Cadillac DeVille

1 Answer

Overheating


open hood pull out oil dip stick, if oil looks like coffee with cream it is possible that the head gasket is bad. if the oil looks a normal color the cooling fans could not be working .have a radiator pressure test done to determine where coolant leak is.

Mar 31, 2009 | 2002 Cadillac Deville

1 Answer

I need the firing order on a 1996 Cadillac Sedan Deville


Firing order 1-2-7-3-4-5-6-8 ..............1-3-5-7 back of engine near fire wall...........2-4-6-8 front of near radiator

Dec 10, 2008 | 1996 Cadillac DeVille

2 Answers

99 seville is overheating. temp gauge gets to 3/4 and back to 1/2 mark. when overheating heat doesnt work but blows hot at normal temp. had headgasket checked and was ok. changed the thermostat and about 6...


My retired uncle has a 97 cadillac deville sts that runs well but after a short distance or time idling begins to overheat. He has replaced the water pump, thermostat and had the radiator and head gasket checked. Unfortunately he lives in a rural area and there is no local cadillac dealership for diagnostic repairs.

Jul 22, 2008 | 1994 Cadillac DeVille

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