Question about 2002 Pontiac Grand Am

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Oil tem gauge is going higher than normal. could it be my thermostat? also, my ac quit working.

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It could be a thermostat but it could also be low antifeeze level or a faulty water pump or worn serpentine belt. First check the belt & if worn replace it. Next check your antifreeze level by opening the rad cap with engine cool. Add if low. Start with cap off & see if there is any circulation of fluid in the rad. Wait for engine to warm so thermostat opens. If there is no ciculation, change the water pump. Also replace the thermostat as it is recommended yearly to be on the safe side. Hope this helps you. Good luck!

Posted on Aug 21, 2010

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and it failed.

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this actually sounds quite normal.
when the oil is cold, it is thicker, and has a higher pressure.
when it warms up, it thins out, and has a lower pressure.

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