Question about 2001 Pontiac Montana

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How do i replace the thermostat in a 2001 pontiac montana?

Where it is located? and how do i get to it?

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  • on_devils_wi Jan 19, 2009

    also found out that you have to remove the throttle body to even get to the thermostat

  • Anonymous Jan 22, 2009

    I have a 2002 montana ,its the worst vehicle to work on because its so compact.I am open to suggestions about how to change my themostat,i cant even see the housing for it

  • uglyknuckle Mar 06, 2009

    So you're just supposed to remove the cross over exhaust pipe! Sounds simple, but looks impossible and after WD-40 and a swear words how do you get those bolts off back by the fire wall...

  • Butch Ruck
    Butch Ruck Jan 25, 2014

    I bought a 1/2 inch ratchet wrench at autozone and removed the air filter cover and hose to access the thermostat housing. Iwas able to lift the small tubes and slide a 1/4inch drive socket with ext bar and remove top bolt. The bottom bolt use a 1/2 in. Ratchet wrench and access from front and under housing there is very little room but it worked. It is difficult to remove the housing but you can jimmy it out. Use a screwdriver to hold the thermostat in and work it out. The back bolt does not have to come all the way out since the housing has a notch to slide onto the bolt. I think it is easier to remove housing if you take out the bottom bolt



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You can replace the themostat without taking the exhaust pipe off. You need to remove the Air Intake between the Air box and the Throttle Body. Remove the Throttle body, hoses attached to it, throttle and cruise cable. The front bolt isn't bad, the back one sucks, it just takes some time and a short wrench helps.

Posted on Mar 14, 2009

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  1. Remove the air cleaner and duct assembly.
  2. Drain the coolant until the coolant level is below the thermostat.
  3. Remove the crossover exhaust pipe.
  4. Remove the radiator hose from the thermostat housing.
  5. Remove the thermostat housing bolts and clean any sealer from the bolt threads.
  6. Remove the thermostat housing and gasket.
  7. Remove the thermostat.
  8. Install the thermostat.
  9. Install the thermostat housing bolts and tighten them to 18 ft. lbs. (25 Nm).
  10. Install the radiator hose to the thermostat housing.
  11. Install the crossover exhaust pipe.
  12. Install the air cleaner and duct assembly.
  13. Good luck...
  14. Fill the cooling system.
  15. Install the thermostat housing and gasket.
  16. Clean the mating surfaces.

Posted on Jan 15, 2009


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Posted on Jan 02, 2017

  • 55 Answers

SOURCE: replace thermostat 2003 pontiac montana

yes but with the right shaped wrenches and tiny hands it can be done without removing the exhaust crossover pipe

Posted on Oct 16, 2008

  • 463 Answers

SOURCE: how hard is it to change the thermostat on a 2001

Hello, it's not very hard at all. Here are some instructions to help you decide if you want to try and do it;

To replace the thermostat in most vehicles yourself;

Remove the hose from the housing, then remove bolts from the housing and lift the housing off
to access the thermostat. Pay attention to witch side is up on the thermostat that you remove, the
new one will have to go in the same way. Also look at the temperature rating that is stamped into
the thermostat that you take out, and make sure the new one has the same temperature rating.
(failure to do so can cause false readings by some sensors, and may start triggering error codes)
Install new thermostat, right side up, put housing back on and bolt back down, hook hose back on
to the housing. Check the coolant level. Start the engine and let it run for 6 to 8 minutes to reach,
"normal operating temperature", and look for any leaking. before you turn the engine off turn your
heater wide open and listen for a click. Most of the time when a thermostat opens you can hear a
click and may hear the coolant flowing through the system. Shut the engine off, wait for it to cool
down and then check your coolant level one more time. ( do not fill all the way up, only fill to
FULL line on resrvior.)

The location of the thermostat for most vehicle.

Stand in front of the car with the hood open, you'll see a black hose hooked to the upper side of the
radiator.( about 2 inch in diameter, newer vehicles about 1 and 1/2 inch, and newer small cars
about 1 and 1/4 inch. ) Follow the hose to the other end, it connects to the thermostat housing. The thermostat is inside of the housing.( the hose usually goes to the air intake manifold, but some
housings are on the side or back of the engine. )

I hope this helps you, and good luck!

Posted on Mar 07, 2011

  • 2920 Answers

SOURCE: 2002 Pontiac Montana Thermostat replacement

check the coolant level fiirst...if that is low it wont give you any change the thermostat you have to follow the top radiator hose to the 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

  • 389 Answers

SOURCE: 2001 pontiac montana overheating no warm air when heat is on

Might be a weak or failing water pump... Does it leak antifreeze or do you have to add antifreeze very often? When the engine gets to operating temperature squeeze the top radiator hose and see if you can feel pressure from the water pump forcing water through it.

Posted on Feb 21, 2009

  • 1066 Answers

SOURCE: need to replace thermostat on pontiac montana van.

public library...Chilton or Haynes auto repair manuals or     make sure you bleed the system

Posted on Apr 03, 2009

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