Question about 2002 Pontiac Montana

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2002 montana getting overheated due to coolant not circulating.coolant is reversing sometimes back to reservoir making it full or goes really low.IN hose is hot-OUT hose is not that cold that of well as there is no heat inside.Its blowing cold air.In heater core IN hose is hot but OUT core is cold.

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  • friday12345 Dec 15, 2008

    I have the EXACT same problem... the resvoir fills in the summer. One other problems is that there does not seem to be very much air flow through the vents... I assume that this is unrelated but does anyone know?

  • planetpuleo Mar 15, 2009

    my 2001 montana is overheating i think due to coolant not flowing.the lower and upper intake has been replaced,the thermostat has been replaced.i can take all coolant hoses off and run water thru them and i can see water flowing thru all hoses and engine block,but when i run the engine the coolant does not flow it seems like it runs backwards thru thermosat and stops.i have no heat and the air hardly blows thru vents on high.i think that the radiator might be cloged?

  • Anonymous Mar 26, 2014

    cold air blowing for heat

  • Anonymous Mar 29, 2014

    overheating, upper rad hose hot, lower rad hose cold



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Sounds like a stuck thermostat. but check if the system has a bleeder screw if it does burp it and that will help also.

Posted on Dec 13, 2008


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