Question about 2000 Cadillac DeVille
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Even though you don't have visible water coming from the exhaust, the combination of overheating and coolant loss still sounds like a blown headgasket.
When the engine is running, you are pushing exhaust gases into the cooling system and producing heating of the coolant the radiator can't handle. When the engine cools down, you are probably sucking a little coolant into one or more cylinders.
Tie an old towel over the tailpipe before starting the cold engine to see if the exhaust gases are as dry as you think.
Depending on how bad or where the head gasket is failing, watch for any oily signs in your coolant, any signs of engine oil turning into hand creme and with a cold engine, take the coolant fill cap off, then start the engine allowing it to warm some and watch your coolant overflow bottle for bubbles. If you find any of those signs and are still not convinced, pull each plug and look for signs of rust on the plugs. If you find it, well . . . Any or all of the symptoms above say 'blown headgasket.'
Posted on Dec 18, 2008
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Posted on Jan 02, 2017
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