Question about 1999 Cadillac Seville

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99 cadillac seville continues to overheat even though i put a new water pump

I just got a new water pump in the 99 cadillac seville. it still overheats. what else could be wrong?

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  • Ned C Cook
    Ned C Cook May 11, 2010

    When does it overheat? idle and low speed or cruising speed, or right away?

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Maybe the water pump wasnt the problem to begin with. if the engine temperature only goes up when you stop the car then most likely it is the FANS that are not engaging to cool the radiator which is a problem with the fan sensor, computer that controls the fans, relay/fuse. I had the same problem on my 1999 cady STS coming back from my vacation. the engine temperature would be normal only when I drove the car above 70km/hr because the air passing through the front of the car would cool the radiator. when I slowed down the fans wouldnt start and no air was passing through to cool the rad, hence the engine temperature would start to go to HOT. good luck.

Posted on Aug 25, 2009

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Posted on Jan 02, 2017

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