Question about 1997 Buick LeSabre

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Thermastat varies in Tempature

Thermasat goes up to 160-170 then drops to130-140 and climbs to the 160-170 and drops again,this happens continuosly,has a new thermastat and has been checked for pressure

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  • fplqnewc
    fplqnewc May 11, 2010

    Have you flushed your radiator lately or used a stop leak?  Does your radiator fluid look brownish or green (antifreeze color)?


    Might be water pump belt slipping or poor circulation in the radiator.

  • Michael Masters
    Michael Masters May 11, 2010

    Make sure the thermostat wasn't installed backwards. this can happen....

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  • 150 Answers

Sounds like the thermostat that is in the vehicle is a 180*. It should be a 195*. If this is not the case then check the temperature gauge sending unit.

Posted on May 21, 2009

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