Question about 2000 Pontiac Sunfire

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2000 Sunfire coolant problem. Engine overheating, changed water pump, thermostat, put new head gasket, checked head, no warp. Started car, went to temperature, blows water out of reservoir. Checked compression 150 psi per cylinder. Filled radiator, left overnight, no drop in water.

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  • Anonymous Mar 17, 2009

    i need to know the location of th e thermostat, to perform the change


  • Anonymous Mar 30, 2014

    How do I know if my 2000 Alero is worth putting a water pump in it, thermostat, and replace the timming and gears. How can I know if the head gasket is blown. They say they can not check because the water pump is not holding enough pressure.

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Ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.

Posted on Mar 13, 2009

  • Steve May 20, 2015

    Was the head pressure tested for cracks? That would cause it to use coolant, too

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