Question about 2003 Pontiac Grand Am

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99 GRAND AM 3.4 GETTING HOT, WE REPLACED THE THERMOSTAT AND WATER PUMP,BESIDES THE RADIATOR, IS THERE ANYTHING ELSE TO CHECK?

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The cooling fan[s] for proper air draw

Posted on Apr 26, 2010

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1 Answer

My 99 Pontiac Montana Keeps running Hot.I replace the thermostat , Coolant Sensor..Is It possible that the water pump Is Bad?


The radiator may be plugged or the head gasket can let compression gasses into the radiator . To check, run the engine without the radiator cap and look in to see if there any bubbles in the coolant. If there is a lot of coolant moving in the radiator after the T/stat has opened, the water pump is ok. If not then suspect the water pump is not circulating enough water.

Nov 09, 2016 | 1999 Pontiac Montana

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My 99 grand am is overheating. I changed the thermostat and it still over heats. what else can cause it to overheat?


How hot does it get in degrees F? Does the radiator fan work? Some fans won't turn on till about 220 degrees F.
Could have blockage in radiator or engine block? Check the water pump. Your serpentine belt ok? Could be gasket issues? Any coolant in the oil or oil in the coolant. Check your coolant temp sensor. Don't replace anything unless your testing points in that direction. Are you losing coolant?

Nov 04, 2016 | 1999 Pontiac Grand Am

3 Answers

Car overheating


Two things to check:

1. Make sure you do not have an air bubble in your cooling system. Easiest way is to park facing uphill and let the car cool off. Remove the radiator cap, start the car and let run until the thermostat opens. If there are air bubbles in the cooling system the should be forced out. Top off fluid.
2. Are you sure that the cooling fan is running? When the car is getting hot, open the hood and make sure the radiator fan is actually turning.

Aug 31, 2015 | 2001 Pontiac Grand Am SE

1 Answer

Keeps running hot change thermostat, fan, moduler


if fan turns on and nothing is leaking try to find a thermometer and check the radiator in different areas sometimes they clog up and only a few vanes are open and not cooling it off properly.youll find cold spots the temp in different area should be the same +or - 10 degree one side to the other.

Jul 13, 2010 | 1999 Plymouth Grand Voyager

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How can i tell when my thermostats bad on my 1999 jeep grand cherokee 4.7l


The best way to test it is to remove the thermostat, and then boil some water in a pot, drop the thermostat into the water and watch how well the thermostat responds. It should open up to the full open position very quickly and if it is slow or lagging to open up, or it does not open fully then replace the thermostat.

May 17, 2010 | 1999 Jeep Grand Cherokee

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1999 Olds Alero. Low coolant light comes on and stays on even though its full. Starts running hot to the 3/4 mark. When the heater is turned on it cools off. Could this be the thermostat or the water pump.


TAKE RADIATOR CAP OFF WITH ENGINE COLD AND CHECK WATER ..MAKE SURE RADIATOR NOT BLOCKED,,PLASTIC BAG ETC. THIS SOUNDS LIKE LOW WATER OR RADIATOR ..STOPPED UP INSIDE ..IF YOU HAVE GOOD HEAT IT'S FULL OF WATER. REPLACE T STAT B4 RADIATOR..IT'S CHEAPER. ALSO CHECK FOR RADIATOR COOLING FAN OPPERATION..I,M RULING OUT THE WATER PUMP.

Mar 20, 2010 | 1999 Oldsmobile Alero

1 Answer

Overheating 99 pontiac grand am


see if your radiator is getting hot it may be blocked, if it is hot in some spots and cold in others it is blocked, also have you bleed the cooling system after you did work to it

Oct 09, 2009 | 1999 Pontiac Grand Am GT

1 Answer

Overheating


Make sure you don't have a bad head-gasket. Check for excessive pressure in radiator or hoses. Check under oil cap for creamy/milk like residue or actual antifreeze in oil or the opposite oil in antifreeze. Let me know what you find. Good Luck

Dec 12, 2008 | 1995 Chevrolet Monte Carlo

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