Question about 1997 Pontiac Grand Am

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Heater core? Hello again, last week i told you about my girlfriend running water through her cooling system. Thank you for the info, I apologize for not giving you make and model, I was attaching my question to someone else's problem and thought that info would be provided to you. The car I spoke is a 1997 Pontiac Grand Am Gt with a 3.1 ltr. V-6. The vehicle is equiped with A/C. We are losing coolant(water) very quickly and, because she was using water, we did not smell anti-freeze inside the cabin. We filled coolant resivoire several times, and saw water leaking from underneath but, i am having trouble locating where the leak is coming from. We did not notice at first that the floor was wet. When i add water, the floor gets wetter and water drips from underneath in two locations; from back of motor (or firewall) and underneath pass side seat. This happens even without the vehicle running. Thank you for your time. -J. Watts

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  • Bullfrog75 Jul 12, 2008

    Thank you very much!!!

  • Anonymous Jan 10, 2009

    neen to know location of heater core so i can replace it



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Yes the heater core is blown you can bypass the heater core on these vehicles fairly easily find the two hoses going from the motor to the firewall unhook them from the firewall get a radiator flush kit from walmart or any other place autozone advance etc. use the corresponding tube size and clamp the two together this will work to get you where you need to go you will not have heat in the vehicle but its summer this buys you time because the heater core on that car is difficult to get out not impossible mind you difficult the part is cheap as things go the labor will kill you in cost you may want to try it yourself get a haynes manual from the parts store read through the section on the heater core twice take a deep breath and go for it.....oh after you bypass the heater core check the system for excessive preassure when first cranked because usually they dont just go out also it probably time for an intake manifold gasket they will use water these cars are super easy to work on up top with a manual parts are affordable let me know if I can help further

Posted on Jun 25, 2008


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ok most cars you wont see a physical drip because the box is sealed to the firewall it will run out the drain hole the same as the ac if bad enough they will leak down the insulation right to the floor board running pure water will cause rust but rarly causes the heater core to blow what you arre looking for is the problem that started it all why she was adding water to begin with you didnt mention the type of car and motor so i really cant get into diagnostic procedures you can bypass the heater core on most cars if it is using that much water you propably have a blown head gasket that will make the heater core blow let me know the type of car and I will help you diagnose it further

Jun 19, 2008 | 1997 Pontiac Grand Am

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