Question about 1997 Cadillac DeVille
It is hard to start because the recent overheat causing a gap between the head gasket reducing the compression ratio in each cylinder hence it is difficult for a combustion.
The most culprit of the car overheating is the poor circulation of coolant due to bad pump or/ and clog up radiator. The 2 important things that have not been mentioned are needed to take care of now.
Posted on Sep 07, 2009
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.
Important point....Do not run your car without a thermostat,.........strangely enough,this can cause overheating on this engine, as the Northstar cooling system is different to most conventional systems.....I can explain how this works if you wish but please understand that running your car without the stat will not help you to diagnose the problem.
Posted on Sep 10, 2009
Could be water pump impeller spinning on shaft therefore not pumping water. Could be you need to flush the radiator, could be a coolant temp sensor, Do you have electric fans? if so do they come on when temp dets hot?
Posted on Sep 07, 2009
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Posted on Jan 02, 2017
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