Question about 2000 Pontiac Montana

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2001 Montana - temp guage does not move - engine check light on -

Same problem...
temp guage does not move
fans on all the time
check engine light on
there is heat and
A/C works...
engine is warm...
did you get your Montana fixed.

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This can be a sign that your coolant level is not adequate. It can also be a sign that your Temp Sending unit is bad. Oviously the first thing I would do is to go through the coolant level check of pulling the radiator cap (on a cold engine) and adding a mixture of 50% anti-freeze, and 50% distilled water until the coolant fills to the top. I typically run the engine with the radiator cap off until it gets to or close to full operational temperature (typically 190-210). When close you should see that the level has dropped after the thermostat has opened and circulated the coolant. Add additional fluid until the level stabilizes at the top again. Once it stablizes at the top replace the radiator cap. Check and make sure the temp gage is reading normal operating temperature. If you only have a light make sure it is not illuminated. You should know this better as you are used to driving the vehicle. If there is still in indication problem then look at other things like the temp sending unit. This is normally found screwed into one of the cylinder heads with a wire coming out of it. One way to check it is an ohmeter to the connection terminals. They don't cost but $15-60 dollars.
There are others issues that can be going on like a bad/worn or broken water pump drive belt (accessory drive belt, serpentine belt), or a bad water pump generally noted by coolant leaking out of weap hole on the bottom near the input drive where the pulley is at. There are other issues that could be causing this, but we won't go into those here (assuming your vehicle hasn't shown more serious indicators).

Posted on Sep 12, 2009

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This particular van gets an air pocket in the engine there are bleeders on the engine to release the air two one by the thermostat the other by the water pump

Posted on Sep 04, 2009

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