Question about Pontiac Montana

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Why would a 2002 Pontiac Montana continuously runs hot after changing water pump, thermostat, and heater cord

Needle goes to red but do not smell coolant

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  • Pontiac Master
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Was the temp gauge doing this before the repairs ?
Does the engine feel hot when the gauge is reading hot ?
If the engine really is hot, it could be a blockage in the radiator or elsewhere. You could also have air in the system and not enough liquid coolant.

Posted on Jan 15, 2013

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salsaurbana
  • 56 Answers

SOURCE: 1999 Pontiac Grand Am Overheating

It is probably the problem. To make shure that need to change the gaskets, one of the symptoms use to be thet the temp rises when you are running at speed 50+ average, where is supposed that the car gets a lot of air due by the speed and nobody thinks that will be overheated.

Posted on Nov 19, 2008

  • 2920 Answers

SOURCE: 2002 Pontiac Montana Thermostat replacement

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

SOURCE: Pontiac Montana '99 Water Thermostat removal

Yes, it can be removed and run without the thermostat. However, your gas mileage will suffer and the heater may not work very well.

Posted on Apr 29, 2009

  • 119 Answers

SOURCE: 2002 subaru legacy heater not working

heater core could be plugged,try removing both heater hoses to core and back flush

Posted on Aug 17, 2009

  • 14036 Answers

SOURCE: my 2002 jeep liberty is running hot i have changed

your clutch on cooling fan could be faulty or your radiators cores is blocked and restricted.also grilled could be blocked restricting air flow.

Posted on Dec 25, 2009

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1 Answer

My Pontiac montana 99 blows cold air,no hot and smell antifrize


likely leaky heater core. May try pellets that GM offers to seal small leaks. Contact dealer or good auto parts store. Rad pellets

Dec 10, 2014 | 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

MY 2002 Montana rus hot when stopped and I have to keep filling the water resivoir on my Montana. There is no leaks, I just replaced the water pump. Where is the water going ?


Out the exhaust pipe. Check the radiator for bubbles. Fill it up to the neck, run the engine to warm it up, give the top hose a couple of squeezes to clear any air from the system. Any continuing bubbles at the filler means a leaking head gasket. Also check the oil for any water.

Oct 02, 2011 | 2002 Pontiac Montana

2 Answers

The cabin heater has not been working for a couple of weeks (it used to blow some hot air but now no hot air) and now the car overheats at idle. Can you suggest a solution or a part to check?


first thing, change the thermostat. this should fix the overheating problem. Your hot coolant goes from the engine to the radiator core, then back to the engine. If your thermostat is stuck shut, you will overheat. try this first, and let me know, If you still have problems, We will get it fixed. hope this helps

Jan 11, 2011 | 2002 Pontiac Montana

2 Answers

My 2001 pontiac montana is over heating one min.. and fine the next when it starts over heating the heater will blow cool air instead of hot and the resavor where the coolant goes will fill up and bubble...


it could be two things...
a heater hose has worn out or got cut in someway or the heater core is bad and needs to be replaced...that could also cause you to smell some antifreeze in the car
and the over heating problem should be that there is still some air in the system after your mechanic changed the thermostat...so some air bubbles might be in the thermostat and then it gets over heated...when the air bubbles get out of the thermostat then the car stops over heating...
so let your mechanic remove all the air from the system in order for the car to run perfect...
it shouldn't be harmful to your wife and kids...but you should try to fix the problem asap :)
Good Luck!

Oct 23, 2010 | 2001 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

2 Answers

Over haeting


Had the same problem....turned out to be the water pump.

Jan 13, 2009 | 1999 Pontiac Montana

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