Question about 1997 Cadillac Seville

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Overheating 1993 cadillac sts engine coolant overheating

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I assume you are talking about a Northstar. Could be a lot of things. Start with the coolant level. Another easy step is to check the coolant pump belt. It is located at the top of the motor (driver's side front). It is under a belt guard next to the valve cover. You can see and feel the belt under the cover without removing anything. The belt is only about 1/4" wide and is driven by a pulley off the overhead cam. You can see the tension pulley as well. My problem was a broken belt and an easy fix.

Posted on Nov 08, 2008

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97 cadillac sts overheating


If everything checks out ok like coolant level and no leaks I would replace the temp sensor for the fans it should be on top and when you buy one look for it on the top of the engine and make sure the fans spin freely by hand with the key in your pocket and engine cold. If they don't spin real easy you may have to replace them.

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1999 Cadillac STS Overheating


i would have to say ck. the easast things first,when was the last cooling system flush making sure all cooling system parts are clean and new coolant added(old coolant looses its abilaty to work properly when old)then have the thermostat ck to make sure it opens and closes at the proper temp.

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1993 cadillac seville sts error code 1039


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I Have a 1997 cadillac sts over heating problem


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.

Jul 02, 2010 | 2001 Cadillac Sts

2 Answers

My 1996 cadillac sts is overheating.. ook how do i get air out of it


There is no need to purge the air out of the cooling system as it is self purging on the northstar engine.
The most common overheating problem with the Northstar engine is a blocked purge line. It's job is to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank,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 further back until you locate the blockage.

Oct 21, 2009 | 1996 Cadillac Seville CA Value

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I need a cadillac seville sts 1998 4.3L & 32


Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,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.

Oct 01, 2009 | 1998 Cadillac Seville

1 Answer

My 1993 Cadillac STS , keeps overheaing , why ?


clogged radiator. over flow tank cracked or to full. thermostat not opening at 190 degress.fans not kicking on. check relays. also check coolant temp sensor and temp sending unit. unplugg the coolant temp sensor it should kick on the fans instantly and illuminate the service engin soon light. do u have a digital cluster? if it is saying stop engin temp replace the temp sending unit. located on the back of the rear valve cover were the spark pluggs are closest to the driver side area

Sep 20, 2009 | 1993 Cadillac DeVille

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False overheated 92 Seville STS


Coolant temperture sensor is the first thing to inspect.
With the engine off and cold.
Pull the connector and clean it.
Check is this the OE sensor. It will have on of the following number on it.
10045847; 12146312; 15321686; 15326386; 25036092; 25036708; 25036979; 25037182

Write any number down, You will help you to get the EXACT match in the auto part store.
The sensor is around $15.
If the contact cleaning does not help then just replace the coolant temperture sensor.
Use the water pump thread sealer to ensure proper seal.
After install the sensor,inspect for ANY coolant leak before put the vehicle back to service,
Please post more information or question on the comment window.
I will follow this post.

Apr 03, 2009 | 1992 Cadillac Seville

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