Question about 1998 Cadillac DeVille
My cadillac is runnig hot after 30 min. the water is pushing out the purge valve.. My purge valve connects to tank , but not to the motor. Is that part of the issue? What is the normal temp. for the Northstr motor?
The normal operating temperature for the Northstar engine is around 210 degrees.
The fans will not come on until the temp hits 225 degrees.
The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems).
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 to near the thermostat housing,the blockage may be there.
If the other end of your purge line is not connected to anything then that is the problem......it must be reconnected otherwise the cooling system is not pressurized.
Posted on Apr 20, 2010
Sounds like your thermostat has failed and is stuck closed.
Your thermostat is located under a metal housing on the top of the engine. The upper radiator hose connects to this housing. To change the thermostat you basically need to drain the radiator after your engine is cold, disconnect the upper radiator hose from the engine, and remove the bolts from the small housing. replace the thermostat, and clean the surfaces on both sides and replace the gasket too. reinstall the housing, attach the hose, and refill the radiator. start the engine, warm it up and check for leaks, then re check the coolant level after the engine cools off again.
Posted on Apr 20, 2010
My cadillac devill got bubles coming out of my reserd tank went et gets temperature half way and my fans are working and the termostat is opening
Posted on Jun 03, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Mar 17, 2017 | Cadillac DeVille Cars & Trucks
Apr 26, 2014 | Cadillac Catera Cars & Trucks
Jul 07, 2013 | 1997 Cadillac DeVille
Jan 02, 2011 | 2000 Cadillac DeVille
Apr 05, 2010 | 1998 Cadillac DeVille
Mar 24, 2010 | 1998 Cadillac DeVille
Dec 18, 2009 | 1995 Cadillac Seville
Oct 17, 2009 | 1998 Cadillac DeVille
Sep 18, 2009 | 1998 Cadillac DeVille
May 29, 2009 | 1993 Cadillac Eldorado
4,826 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: