Question about 1998 Chevrolet Malibu

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1998 malibu cooling problem. over heats, have changed theromstat and radiator. coolant in tank not hot, suspect water pump?

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  • razdude4 Jul 12, 2009

    No flow at radiator with cap off. Heater on no heated air out of vents. Coolant tank is where the pressured cap is attached. Coolant cold in tank when engine overheats.

  • Richard Scordino May 11, 2010

    Even a failed water pump will move coolant. they leak or get noisy but it's nearly impossible for a pump to not pump. I suspect that either you somehow got the thermostat in there backwards or you have a blown head gasket that is pushing so much exhaust into the cooling system that it's blowing the coolant out of there before it even gets a chance to get hot..

  • Mike Butler
    Mike Butler May 11, 2010

    Do you not see any flow in rad when cap is off and you let it run to operating temperature, and fan comes on? You should actually see flow just before fan comes on. Did you run engine with cap off, and heater on heat after thermostat replaced?

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  • Chevrolet Master
  • 3,640 Answers

Thats a big possibility that the water pump is not circulating right.

Posted on Aug 26, 2009

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