Question about 1999 Mercury Sable

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What causes over heating that is not the water pump nor the head gasket after pressure testing?

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Couple of things....if your radiator is gunked up on the inside or the outside even from debris, that can cause poor flow/circulation and not cool enough for your motor. Also, the thermostat can stick and cause overheating. One last thing, the fans. If the fans aren't running you won't get proper cooling either....that's pretty much it!

Posted on Jun 28, 2009

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My car heats up in stop n go traffic. The temperature gauge can go as high as to the 'RED'. I adding water and coolant everyday. Are the fans supposed to come on as I am driving and the car heats up?


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