Question about 2002 Pontiac Montana

1 Answer

2002 montana getting overheated due to coolant not circulating.coolant is reversing sometimes back to reservoir making it full or goes really low.IN hose is hot-OUT hose is not that cold that of engine.as well as there is no heat inside.Its blowing cold air.In heater core IN hose is hot but OUT core is cold.

Posted by on

  • 2 more comments 
  • friday12345 Dec 15, 2008

    I have the EXACT same problem... the resvoir fills in the summer. One other problems is that there does not seem to be very much air flow through the vents... I assume that this is unrelated but does anyone know?

  • planetpuleo Mar 15, 2009

    my 2001 montana is overheating i think due to coolant not flowing.the lower and upper intake has been replaced,the thermostat has been replaced.i can take all coolant hoses off and run water thru them and i can see water flowing thru all hoses and engine block,but when i run the engine the coolant does not flow it seems like it runs backwards thru thermosat and stops.i have no heat and the air hardly blows thru vents on high.i think that the radiator might be cloged?

  • Anonymous Mar 26, 2014

    cold air blowing for heat

  • Anonymous Mar 29, 2014

    overheating, upper rad hose hot, lower rad hose cold

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Sergeant:

    An expert that hasĀ over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 362 Answers

Sounds like a stuck thermostat. but check if the system has a bleeder screw if it does burp it and that will help also.

Posted on Dec 13, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Hi carl i had pontiac montana m1999 overheating after i travel like 40 km n all the coolant going back to the reservoir


Hello, if you've changed the pump. cap. and t-stat and its overheating still i need to say that just because you replaced those parts doesnt necissarily mean they work. Im mainly talking about the t-stat and cap. was this your first time installing a tstat? They go in a certain way. Make sure you put it in the right direction. Your vehicles engine might require you to purge your coolant system of all air. On some cars air will remain trapped in the area right at the tstat causing it not to work therefore not opening up and no t circulating the coolant. I would start there myself. If thats not the case, next id flush the radiator. I would like to know what the problem symptoms were wich led yoy to replace those parts please.

Dec 07, 2011 | 1999 Pontiac Montana

1 Answer

Coolant reservoir is full and radiator is empty why is it not circulating?


Hi Tiffany,

The engine coolant does not "circulate" through the reservoir in your Jeep. This system works on the fact that things expand when they are hot and contract when they are cold. When the radiator is full, the coolant expands when the engine gets hot and the overflow runs down the small hose to the reservoir. When you shut the engine off, the coolant contracts and a vacuum is created inside the radiator causing fluid to be drawn out of the reservoir and into the radiator. When you start your engine and it gets hot, the cycle begins again.

If the radiator is empty, this sytem cannot work. There will not be enough vacuum generated in the radiator to draw the fluid from the reservoir (too much empty space and not enough coolant contracting as it cools).

You need to find out WHY the radiator is low. If it is low, there is a reason for it. Either something is leaking EXTERNALLY like a hose or water pump, or something is leaking INTERNALLY like a blown head gasket or a cracked cylinder head. Proper diagnosis is recommended.

Oct 30, 2011 | 2001 Jeep Grand Cherokee

1 Answer

Coolant leaking from coolant reservoir and overheating


Hello jmuse3...If the coolant reservior is damaged or cracked causing the leak it will need to be replaced. If it is from the overflow due to the overheating, it won't need to be. There are several componets that make up the cooling system on your Lincoln, they all need to work together to keep your engine from overheating. Thermostat sticking, or not fully opening. Radiator clogged, preventing circulation of the coolant. Electric cooling fans not working. Defective water pump.
These are things that need to be checked. If you need more assistance, reply back.
I hope this helps.

Aug 31, 2011 | 2000 Lincoln LS

1 Answer

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

The windows get frosty while I'm driving and the heater is on


First off make sure your radiator is full and check the overflow level. Low coolant level will cause the van not to blow out much heat. Check your vent operation, sometimes the doors stick that directs the air flow, your fan can be blowing like crazy but very little coming out of the selected position. On some of these Montanas there is a pump in the heater hose that circulates the antifreeze, if that pump goes bad or the relay you may not be getting enough heat to your heater core to do you any good. Check these things out and I think you'll find your problem.

Feb 27, 2011 | 2001 Pontiac Montana

1 Answer

A symbol with an arrow pointing down at a low water level it looks like came on in my car a couple days ago and I don't have a clue as to what it is...I own a L200 saturn 2003


Its a warning light to let you know that your coolant level is low. When the engine is cold remove the reservoir cap. If the coolant is red add a mixture of 50/50 dexcool and water. If the coolant is green add a 50/50 mix of regular coolant and water. If you cannot tell what color it is add a 50/50 mix of all make/models coolant and water.

Fill until the level reaches the full mark on the bottle.

Sometimes it will take the light a little while to go out and sometimes you literally have to whack the reservoir a couple of times with a rubber mallet to get it to turn off.

If it goes low again in a fairly short period of time than you most likely have a leak in the cooling system.

Dec 07, 2010 | 2002 Saturn L-Series

1 Answer

We have a 2000 Pontiac Montana and it's overheating and has no heat. We have a fairly new (3 months old) radiator and the thermostat seems to be opening and closing, and the antifreeze is circulating when...


Yes,You need to bleed the air from the cooling system,use the bleed valves,one is near the thermostat,and the other is on a pipe sticking up toward the front of the engine,make sure there is enough coolant in the system,and start and run the engine when it gets warm,not hot,open the bleeder near the thermostat,and watch for coolant,and air to come out,leave it open about 10 to 25 seconds,then close it and wait about 3 minutes or so,and bleed the other bleeder.You may have to repeat the process more than twice,and keep the coolant reservoir full.If this was helpful,please rate,thank you

Aug 26, 2010 | 2000 Pontiac Montana

1 Answer

Add coolant 2002 s class


When engine cold , find coolant reservoir , usualy of white or yellowish container with black top and cap.
It has marks on it FULL and LOW.
Fill it up to FULL level and you done.
If it does'n have any coolant in there , then fill it up and run the engine for few minuts with open reservoir cap. Keep filling it up if level goes down , once it's stop or start to going up, close the cap and drive it around the block ,cause they have self bleeding cooling system.

Jun 30, 2010 | 2002 Mercedes-Benz S-Class

1 Answer

Blue coolant light comes back on and flashes? why


The light should be for a low level sensor in your coolant reservoir. Check your coolant level (when vehicle is cold), if fluid level is ok then the sensor is probably the culprit.

Mar 09, 2010 | 2002 Volkswagen Beetle Turbo S

1 Answer

Low coolant light comes on


if the van is not overheating and the coolant is full than your sensor is bad

Nov 12, 2008 | 1999 Pontiac Montana

Not finding what you are looking for?
2002 Pontiac Montana Logo

511 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts

yadayada
yadayada

Level 3 Expert

60960 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...