Question about 1996 Cadillac DeVille
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.
Posted on Oct 11, 2009
Make sure that the A/C condenser in front of the radiator is unobstructed and that the fans are operating correctly.
I'm assuming that you have had the car tested for hydrocarbons in the radiator and that there is no steam coming from the tailpipe and you have no leaks? (head gaskets)
Posted on Oct 07, 2009
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Posted on Jan 02, 2017
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