Question about 1997 Pontiac Grand Am

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Either a leaking hose going to the heater coil or a bad heater coil. Water gets inside car on front floorboard.How do I replace heater coil?

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  • Goodwrench4 May 11, 2010

    You state water gets inside the car. The heater core would leak coolant, or antifreeze. Please clarify?

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  • 343 Answers

To be honest, most mechanics hate replacing heater cores because of their location. They are usually on the firewall on the inside of the car underneath the glove box under the dashboard and behind a plastic black cover. If you look under the hood at the firewall on the passenger side, you should see on inlet hose and one outlet hose which should be replaced along with the heater core. They must be removed first before you can remove the heater core. Basically you have to lay on your back on the passenger side Front) floorboard, remove the necessary panels to get to the cover, remove the heater core and install the new one first, then intall the new hoses, reinstall the cover and any panels you removed. Lastly, be sure to bleed and top off the coolant while you run the heater, then check for leaks

Posted on Apr 30, 2010

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1 Answer

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this should be the heater core,is the pipe itsself bad or is it just the hose needing replaced?does heat work,is the passengers floorboard wet with coolant?could be the hose bad or the heater core bad,some cars have whats called a heater control valve right there at the firewall that the hoses hook up to,it could be bad,if hoses just hook up to two pipes sticking out of firewall,check hoses first,then look in passengers floor to see if its wet,heater core is inexspensive but costly to have replaced.

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