Question about 2002 Pontiac Montana

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2002 Pontiac Montana Thermostat replacement

How do I change the thermostat in a 2002 Pontiac Montana?
Little to no heat.

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  • Anonymous Mar 19, 2014

    Hit pothole in 2002 Pontiac Montana and gauges stopped working now van won't start

  • Anonymous Mar 19, 2014

    Hit pothole in 2002 Pontiac Montana and gauges stopped working now van won't start

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Check the coolant level fiirst...if that is low it wont give you any heat.....to change the thermostat you have to follow the top radiator hose to the engine.at the send of it you will see a clamp take it loose...then you will see the thermostat housing its held in place by 2 bolts . once you remove them you have the thermostat....make sure you clean all the old gasket material off both the housing and mount.also make sure you get a new gasket.

Posted on Jan 29, 2009

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4 Answers

99 pontiac montana overheaten already changed thermostat what is it?


you have a GM common problem and that is a bad intake manifold gasket. GM change the gaskets to plastic and they crank and leak causing over heating. here is a picture of one i took from a 2005 pon. bonneville with 74,000 miles on it2_12_2013_3_00_09_am.jpg

Feb 12, 2013 | 1999 Pontiac Montana

1 Answer

My 2002 Pontiac Montana gets to hot in a short distance. I don't know what it is I have an idea it's either the thermostat or a blown head gasket not sure which one. So which one is it?


You would need to figure out if the thermostat is stuck closed, or not.
Most mechanics would either replace it or take it out and run the engine without it as a test. If the engine still overheats with the thermostat out, it could be a faulty water pump, restriction in the radiator, or other problems.
A blown head gasket should leak coolant out on the ground or into the engine.

Jul 28, 2012 | 2002 Pontiac Montana

1 Answer

How to replace thermostat


whats the cost on getting a thermostat changed,i was gonna get a radatior flush but advised not to until i changed my thermostat it worn out i guess is what im saying,

Aug 31, 2010 | 2002 Pontiac Montana

1 Answer

How to change thermostat on a 2002 Pontiac Montana


I believe the Montana has a 3.4 Liter V6 Engine.
This thermostat is located under the exhaust "crossover" pipe that runs between both the front and rear cylinder heads. Divers side.
Remove the heat shields (10mm bolts) and then the nuts on the exhaust studs. (6 total)
Two bolts hold the T stat housing to the intake.

Feb 23, 2010 | 2002 Pontiac Montana

1 Answer

Help please need to change thermostate


OK FOLLOW YOUR TOP RAD, HOSE TO YOUR ENGINE THAT WILL BE THE THERMOSTAT HOUSING ON A 3.4 IT IS BEHIND EXHAUST CROSSOVER PIPE THE BOOK CALLS FOR YOU TO TAKE THIS OFF. ONCE YOU GET IEXHAUST OFF THERE IS TWO BOLTS ON THE HOUSING PULL THEM PAY ATTEN. TO WHICH WAY THE THERMOSTAT IS SETTING (VERY IMPORTANT) THEN PUT TOGETHER IN REVERSE. P.S I HAVE DID THIS WITH OUT PULLING EXHAUST PIPE.

Feb 12, 2010 | 2002 Pontiac Montana

1 Answer

2002 Pontiac Montana, No Heat, I put the temp control on


the cabel from the heat dial to the heater box behind the dash could be snaped or jamed thus not opperating the lever which operates the flap which open and closes the heat box next to the matrix. or if your coolant is brown in colour it could be your matrix is clogged with sedament and needs flushing out. or it could be your water pump not pumping coolant round your engine or it could be a knackerd thermostat i hope these will help you id start with the easyest first thermostat

Dec 17, 2009 | 2002 Pontiac Montana

1 Answer

I need to replace the thermostat on a 2002 pontiac montana. I have a Haynes repair manual for 2001 pontiac montana with picture location of thermostat housing but I cannot visually find it even using a...


Where the upper radiator hose connects to the engine you will find the thermostat under that housing. You must drain the radiator and remove the upper hose. Then remove the 2 bolts holding the housing in place. Make sure to pay attention to which way the thermostat is mounted, spring up or spring down.

Aug 02, 2009 | 2002 Pontiac Montana

1 Answer

Temperature gauge doesn't work. Leaving the engine light on. 193,000 Ks, Still get a little heat but not much, Would it be the thermostat?


this would be a defective thermostat (stuck open), change it out and this should cure the issue. disconnect the battery for 5 minutes to clear the engine light.

Mar 31, 2009 | 2001 Pontiac Montana

1 Answer

Heater problems


Have you tried checking the coolant lines going into your heater core to see if there restricted, it could also be a bad water pump, or a worn or loose drive belt. It sounds like you have poor coolant flow goiing through your system. You might want to also check your coolant reservoir cap to see if it is maintaining the proper pressure. Good luck.

Mar 12, 2009 | 2002 Pontiac Montana

1 Answer

Looking for an engine diadram of where a thermostat housing is on


Is that an European Pontiac, is not such thing in USA call Montana

Jan 22, 2009 | 2001 Pontiac Montana

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