Question about 1998 Chevrolet Cavalier

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2000 cavalier. runs hot at idle- temp gauge rises slowly all the way up - fan kicks in - when rev engine temp drops - the higher the rpm the lower the temp. heater runs warm when temp hot but gets col

Had trouble with leaking head gasket before - losing coolent, but used blue devil and now coolent not dropping. but problem as stated.

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Did you change thermostat.

Posted on Nov 28, 2013

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That stuff stops leaks but also can plug up the cooling system. I would check the thermostat first as I have seen it plug them.

Posted on Nov 28, 2013

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What is blue devil. If it "Stop leak" that is not a recommended fix for a bad head gasket and quite often causes further issues. Have the car looked at by a competant mechanic.

Posted on Nov 28, 2013

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SOURCE: 2004 Tahoe Heater Problem

check coolant level ,must be low ,chck for coolant loss

Posted on Mar 05, 2009

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