Question about 1996 Pontiac Grand Prix

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What would cause all the coolent to go into the over flow and cause the car to over heat?

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  • mikespag Mar 06, 2009

    i have replace the thermostat twise and i have replaced the head gasket and the fans work right

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Stuck thermostat or blown headgasket would be a possiblity also if fan isnt working it could happen

Posted on Mar 06, 2009

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2 Answers

1996 chrysler cirrus heater fans not blowing hot air to vents or defrost. Not sure of actuator or thermostat. Since i dont know where they are. 2.5L V6 - 4 cylinder.


I will assume that your engine is full of coolent, and does not overheat. Now if your car takes like forever to heat up, It will be that your thermostat is stuck open, but after a while, you would have heat in your car. If your engine coolent hoses get hot, but your heater hoses do not, remove the heater hoses where they connect to the engine. This is the first place dirt, grime, and corrossion build up, stopping the flow of hot coolent from going through your heater core. (heater hoses stopped up at engine/waterpump connection.) Your heater core may also be stopped up if there is alot of corrossion present.

The thermostat is located directly under where your upper radiator hose connects to the engine.

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Dec 10, 2013 | Cars & Trucks

2 Answers

I replaced my radiator and thermostat. Yet I still have no heat. So is it the heater core ? Also the gauge is below C and I would like to know what is causing that issue?


Assuming that you have the proper amount of coolent added, check where your heater hoses connect to the engine block for rust and corrossion, this is a common area to clog up, preventing coolent flow from circulating through your heater core.

Dec 08, 2013 | Cars & Trucks

1 Answer

No heat 2006


Assuming that you have the proper amount of coolent added, check where your heater hoses connect to the engine block for rust and corrossion, this is a common area to clog up, preventing coolent flow from circulating through your heater core. If ok, check for a thermostat that is stuck open.

Dec 08, 2013 | 2002 Kia Spectra

1 Answer

Dodge shadow poor heat


Possible causes include low coolent level ( I know it sounds wrong, but if the coolent level is low hot coolent won't circulate to the heater core)

The thermostat may be stuck open, if it is the engine won't reach proper operating temp. Only solution is to replace, but it is easy to do and thermostats are inexpensive.

Heater core may be plugged, this is more likely if stopleak has ever been used to stop a radiator leak. Solution would be backflushing the heater core.

The valve that controls the flow of coolent to the heater core could be stuck or defective or the vacuum switch that controls the valve might be defective.

Jan 22, 2013 | 1994 Dodge Shadow

2 Answers

1996 PONTIAC GRAND AM LOW COOLENT LIGHT ON


the lower coolant sensor is inside the over flow bottle11_26_2012_10_52_50_pm.png

Nov 26, 2012 | 1996 Pontiac Grand Am

1 Answer

Heat does not work


you can find the coolent lines into the heater through the fire wall disconect them and put pressure through the core to see if its clogged other than that possably a coolent flush cause stuff builds up in the antifreeze and clogs the lines. your heater uses the heat from the engine coolent to heat the air in the heatercore so naturally if you got bad coolent you got heating problems too

Jan 11, 2009 | 2001 Jeep Cherokee

1 Answer

Coolent light and check engine light


Your thermostat will not affect the heat in your car. This is controlled by the heater core which is pulled from coolant from the engine where the coolant will be the hottest. Your thermostat opens and allows the coolant from the engine to circulate into the radiator and the coolant from the radiator flow into the engine. A thermostat is cheap and easy to replace. The sensor should be a fairly inexpensive and easy replacement as well. I would change out the sensor first because bad thermostat would create an overheating problem.

Nov 20, 2008 | 2000 Pontiac Grand Prix

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