Question about 1999 Chevrolet Cavalier

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What determines a bad thermostat? Having trouble starting, temp gauge is erratic, heater is working randomly. Thank you

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If it went bad in open position you will have no heat,,,If in close position you will have lots of heat and if it dont open as it should car will over heat,,Whats the car doing.Every time I even think of a cav a bad headgasket rolls accross my mind,,,,,they are nortorious for that problem.look for a water stain at right hand sid of head like dripping down the engine,it might be dry when you look at it,but the discolored stain will be there,if its bad,,,,,heater is working randomly? do you mean the fan motor blowing or blowing but no warm air?

Posted on Mar 11, 2011

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