Question about 2000 Pontiac Grand Am GT

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Bad leak, dont know if its water pump or thermostat

I been having a leak for a few weeks. someone told me its the water pump. today a friends checked out my car and he said its the thermostat thats leaking. once i put water in, you can see the water running out the bottom of the car. i have a pontiac 2000 grandam. my water pump is on the left side of engine. the leak come from about the middle, i can see a water path from thermostat to ground. my low coolant light flashes when it runs out of water, usually i have to fill it to take kids to school and back, then its empty. any suggestions? can it be thermostat? or the water pump? or something else..

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  • lilmario Sep 29, 2009

    4 cylinder

  • Joseph Howard May 11, 2010

    what size engine do you have?

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  • Master
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On the 2.4L engine your water pump is driven by the timing chain and its location is near your thermostat area there is also some seals at metal water pipes at the same general area.the way the water is coming out I would suggest that it is coming out your water pump bearing hole but your cooling system should be filled and pressurized and diagnosed by a professional if at all possible.You want to make sure you are replacing the correct component because a water pump replacement on a DOHC 2.4L can be rather expensive.I hope this helps.

Posted on Sep 29, 2009

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  • Master
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Sounds like your water pump gasket has a hairline crack in it and as engine warms it expands and leaks more

Posted on Sep 28, 2009

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Posted on Jan 02, 2017

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