Question about 1991 Pontiac Grand Prix

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Im trying to change the thermostat on a 91 grand prix. i cant figure how to get that little support hose thats mounted on the bottom bolt of the housing??

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Posted on Jan 02, 2017

  • 1114 Answers

SOURCE: thermostat

Isn't that thermostat rite in the rad cap hub? maybe you should pick up a service manual at part store that will show you all and more!! good to invest in if your doing your own work!

Posted on Dec 23, 2008

davidg65
  • 26 Answers

SOURCE: 2002 Pontiac Grand Prix Thermostat

as you face the engine the thermostat bell is on the right (drivers side) Follow the radiatoe hose. Remove the two bolts and raise the bell still attatched to the hose. the thermostat is there with the rubber seal. You can gently pry the thermostat out with a screwdriver or something similar. Put in new thermostat be sure it is the same as the old one, and then replace or change the seal (be sure it is the smae size and thickness as the old one as I got the wrong size from Napa) Then replace the bell, and tighten, but not over tighten. I hope this helps!

Posted on Jan 31, 2009

  • 1 Answer

SOURCE: engine light on, scan code said thermostat

93 grand cherokee limited signal lights don't work could u help me/

Posted on Feb 16, 2009

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SOURCE: removing water pump on 97 grand prix gt. Power

no you have to go thru the holes in the front of the power steering pulley. Usually a ratchet with a deep 13mm socket will do to remove the 2 bolts located at 12 and 6 o'clock then you will be able to move it out of the way

Posted on Jan 11, 2010

mlapres
  • 757 Answers

SOURCE: replace thermostat on 2003 grand prix gtp with

The thermostat housing is located in the upper radiator hose. You will see a metal elbow secured by two bolts into what I remember is the upper intake manifold...don't quote me on that but you will see it regardless of whatever I call it. Anyways, GM decided it was a good idea to put stainless steel bolts in there but that makes it easy to strip the threads in the bolt hole so I think it's best when you put your wrench on the bolt to just tap on the handle till you vibrate it loose, then turn it.
When you pull off the housing you'll lose a little coolant and it will create an air pocket which we'll address. It's a 50/50 chance that the thermostat housing gasket will either stick to the housing or the engine...it may be torn, cracked or flaking in either case clean both contact surfaces before you replace the gasket. I recommend an oil impregnated poly material gasket.
Note the position of the thermostat in the hole and place the new one in as such.
I recommend a 180 degree thermostat...stock is 195 but the GTP runs better with the 180.
Put on gasket and reinstall the hose/housing assembly, alternate from one bolt to the other so the housing mates flat and cannot cause a leak.
Next, fill the coolant overflow bottle to the "HOT" mark. If the bottle is dirty and hard to see just put a light on top of the bottle...GM didn't mark it very well so if it's not squeaky clean you can hardly see a damn thing.
*IMPORTANT** if your car still has Dexcool in it, DUMP IT. It will eventually destroy the motor.
If not...continue on. Start the car. Go back to the thermostat housing and place a rag on top of, and twist the peacock valve on top of it to let the air out until it starts to get coolant on the rag. Done.

Posted on Feb 27, 2010

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1 Answer

Where is thermostat in a 2002 grand prix


Follow the upper radiator hose to the engine block. There should be an 'L' shaped housing connected to the top of the block by a couple of bolts. Remove bolts, lift the housing and pry off the thermostat with a flat screwdriver. Be careful though cuz any fluid in that hose will spill. This video may help: https://www.youtube.com/watch?v=5sccV_4R2Ts

Jan 20, 2015 | 2002 Pontiac Grand Prix

1 Answer

How to change a thermostat?


With the 3800 you need to remove the engine cover(the little plastic dress up piece held on by oilf fill cap/tube and a bolt or two) then at least partially drain the radiator if not completely(good time to change coolant) follow the top radiator hose back to the motor remove it there. Where that hose connects to the engine is. The thermostat housing remove the two mounting bolts and lift the housing off(careful with. These bolts they are easy to strip) then remove the Thermostat. Place in the new part( make sure you have it in the right way there should be a flow marking with an arrow the coolant flows out towards the radiator) replace the gasket or rubber oring on the thermostat housing and reassemble. After you fill your radiator back up you will need to bleed the air out of the system there should be a bleeder screw on the thermostat housing start your car let it idle a few min then open the bleeder.(repeat until you. Just get coolant allowing a min or two between each time you open and close the bleeder. It also be helpful to have the vehicle facing uphill as it aids in bringing the air to the top of the motor.) Check coolant level and your done

Jan 05, 2012 | 2006 Pontiac Grand Prix

1 Answer

How to replace a thermostat on a 1999 pontiac grand prix


  1. Disconnect the negative battery cable.
  2. Lower the coolant level a bit.
  3. Follow the top radiator hose to the thermostat housing.
  4. I would just leave the hose on for this thermostat and go right to removing the two mounting bolts.
  5. Pull the housing up and clean the gasket off bothe sides of the gasket real well. Becarefull not to gouge the aluminum.
  6. Install the thermostat with the little "tip" facing up.
  7. Now put the new gasket and a little sealer on it too.
  8. Reverse the previous steps to finish the installation.
  9. When you get the antifreeze full remember to burp the system with that little bleeder valve on top.
  • see diagram below for a visual.


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  • Hope this helps.

Nov 01, 2011 | 1999 Pontiac Grand Prix

1 Answer

Looking for thermostat housing hose that leads from radiator to engine goes straight to water pump 2007 grand prix 3.8l


the hose that goes to the water pump is usually the bottom radiator hose, the radiator hose that goes to the thermostat housing is the top radiator hose......cheers.

Sep 20, 2011 | 2007 Pontiac Grand Prix GXP Sedan

1 Answer

How to change a thermostat in a 2000 Pontiac Grand Prix


You may need to drain a little of the antifreeze to get level below the thermostat level. Make sure you have something to catch the antifreeze and discard it properly.
Follow the water outlet from the radiator and where it goes into the intake manifold. Remove the two bolts one on each side to remove the thermostat housing. It is not necessary to take the hose off of the the housing. Remove the thermostat and make sure that both surfaces that meet when you put back together are clean and free of debris. You should get the gasket along with a new thermostat and replace both. Make sure you only use DEXCOOL to replace any antifreeze that was lost.

Dec 09, 2010 | 2000 Pontiac Grand Prix

1 Answer

Need a diagram so I can find where the thermostat is on a 1994 grand prix , to change it


Don't Think you'll need a Diagram, Just Open Hood and Locate Upper Radiator Hose and Just take your hand follow the hose down to Your Engine,You'll Come to a Metal Dome with a Hose Clamp and you'll see 2 Bolt Heads .Remove Upper Hose From the E ngine and Then The Thermasat Housing with Those 2 Bolts.Under the Housing is where your Therma Stats Located..

Mar 01, 2010 | 1994 Pontiac Grand Prix

1 Answer

Where is the thremostat on a 2002 Pontiac Gran Prix


Fig. The thermostat on this 3.1L is mounted horizontally and uses an offset housing/water outlet

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Fig. Exploded view of the thermostat arrangement-3.8L engines

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Fig. Thermostat arrangement-3.4L (VIN E) engine

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Fig. The thermostat and water inlet assembly are combined in one assembly and must be serviced together-3.5L (VIN H) engine

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It is usually possible to leave the radiator hose attached and simply remove the thermostat housing (also called a water outlet) and flex the radiator hose enough to service the thermostat. It is good practice, however, to remove the radiator hose so the thermostat housing can be given a thorough cleaning. Debris on the thermostat housing sealing surface can cause leaks.


Some applications may have electrical connections to sensors which mount in the thermostat housing. Use care when detaching these connectors.


Unfasten the thermostat housing bolts and remove the housing.

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Remove the thermostat by simply pulling out; then remove and discard the gasket from the thermostat.

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I really hope help with this. Good luck (remember rated this help).

Feb 13, 2010 | 2002 Pontiac Grand Prix

2 Answers

2002 grand prix motor 3.8 just want to know where


Exploded view of the thermostat arrangement—3.8L engines

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Oct 31, 2009 | 2002 Pontiac Grand Prix

3 Answers

THERMOSTAT REPLACEMENT


Follow the hoses leading from the radiator to the block -- upper hose first. Where the hose connects to the block there is a housing -- the thermostat is in that housing.

May 29, 2009 | 1999 Pontiac Grand Prix

2 Answers

2002 Pontiac Grand Prix Thermostat


as you face the engine the thermostat bell is on the right (drivers side) Follow the radiatoe hose. Remove the two bolts and raise the bell still attatched to the hose. the thermostat is there with the rubber seal. You can gently pry the thermostat out with a screwdriver or something similar. Put in new thermostat be sure it is the same as the old one, and then replace or change the seal (be sure it is the smae size and thickness as the old one as I got the wrong size from Napa) Then replace the bell, and tighten, but not over tighten. I hope this helps!

Dec 10, 2008 | 2002 Pontiac Grand Prix

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