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DesertViper43

Desert ... 4/14/2010

1990 GMC C2500 Sierra 8 Cyl 5.0L

Engine

Engine Temp will not stay even

The Vehicle water temp Raises and lowers even after i replaced water pump, radiator,themostat and coolant. It will almost over heat then drop and start to rise in temp and cools

3 Answers


Gary

Gary 8/1/2010

Possible bad or wrong thermostat, make sure goose neck is clean and clear.

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nomilav49

nomilav49 12/10/2012

try a new thermostat

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0
felplay auto repair.

you may have a bad fan clutch.

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0

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