Question about 2001 Pontiac Montana

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2001 Pontiac Montana overheating

We changed the thermostat and it is still overheating. Checked the coolant and it is fine. Also, now we are not getting any warm air when we turn on our heater, but we didnt have a problem with this before.

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You have air pocket in system let run with rad cap off you should see it burp after it does take down road full throttle should move pocket and gausge should go down.

Posted on Jan 05, 2009


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Posted on Jan 02, 2017


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1 Answer

Van overheating

Pushing coolant into the reservoir is a symptom of a bad head gasket. Have the coolant check for combustion gasses. Easy test.

Aug 01, 2017 | 2000 Pontiac Montana

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My 2001 Montana is overheating with fans running, full of coolant, new thermostat what else could cause overheat besides small intake leak

head gasket and/or cracked head..notorious for it, usually rear head, but if ya pull it down do both head gskts and send heads outto be checked for cracks

Apr 17, 2012 | 2001 Pontiac Montana

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2002 pontiac montana overheats

i would 1st check the thermostat, most overheating problems result from the thermostat sticking closed, and not allowing the coolant to circulate, while you are doing this, check the upper and lower radiator and heater hoses, to make sure that they are not collasping, also check the coolant temperature switch. this switch is normally located on the top of the intake manifold, most of the time, not too far from where the top radiator hose is connected. hope that this information has helped you.

Mar 30, 2011 | 2002 Pontiac Montana

1 Answer

2001 Pontiac Montana. Van overheats (redlines) occasionally, which results in loss of heat (very cold air). When this happens lights flicker, like something is turned on??? After this their is a loss of...

Where do you hear a valve or flapper moving??? Behind the dash ( instrument panel ) It sounds to like you have a electrical problem , not overheating problem . You need to test to see what the real engine temp. is . Also have vehicle checked for DTC'S - diagnostic trouble codes ,Sounds like A/C is kicking on , the flaper noise you hear is probably the temp actuator inside the dash . You can buy the tool in the video at harbor freight cheap. Point it at upper radiator hose ,near the engine . The IPC illuminates the hot coolant temperature indicator in the message center when the IPC determines that the coolant temperature is greater than 128°C (262°F). The IPC receives a class 2 message from the PCM indicating the coolant temperature. Are you getting any such message ?
How to Use an Infrared Thermometer to Diagnose Car Problems

May 07, 2017 | 2001 Pontiac Montana

1 Answer

I have a 2005 pontiac montana and i am having trouble with it over heating, i have changed the water pump, thermostat, heat sending unit, drained and flushed the radiator and purged the air out of the...

Sean I have a 2004 Montana and mine is also overheating. I just paid Pep Boys $300 to replace thermostat and it is still overheating. They checked for coolant leaks, water pump is okay, the pressure checked out ok. No air in the system, etc. Today I brought it to a different mechanic and he says my cooling fan is kicking in very slow after the temp gauge goes 3/4 up which is not supposed to happen. My fan does not have a relay and he said it is either the temperature sending unit, but most likely it is the COMPUTER which is going to a very, very expensive repair. He said this happens a lot with Montanas! I am pissed. I just bought it used and the previous owner probably dumped it b/c he knew it needed a computer. Also the Fuel gage does not work and it will cost $800 to replace the fuel tank which contains the fuel sensor.

Dec 24, 2010 | 2005 Pontiac Montana SV6

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2000 Montana heater problems. Only get very little heat in warmer weather. Temp guage doesn't always move. A/C and air flow are both fine. What could this be?

Your thermostat may be stuck open. Your cooling system could be low on coolant, but if that was the case your temp gauage should still move.
Would probably start with a thermostat-you may even have trouble code stored for the thermostat(P0128).

Oct 02, 2009 | 2001 Pontiac Montana

1 Answer

Coolant problems related to transmission?

tran should be ok need to take head to repair shap and be sure head is ok and not cracked. thermostat, radiator, or cap, hoses need to be checked to dtermine what caused it to run hot also check engine fan. Pls rate this solution

Feb 17, 2009 | 2000 Pontiac Montana

2 Answers

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.

Nov 19, 2008 | 2001 Pontiac Grand Am SE

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