Question about 2001 Pontiac Grand Prix

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Pontiac GP water pump replacement

Trying to find step by step instructions for a water pump and serpentine belt replacement for a 2001 Pontiac Grand Prix with the 3100 series engine

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Drain the cooling system.
Remove or disconnect the following:

Negative battery cable Accessory drive belt guard Water pump pulley bolts, loosen Accessory drive belt Water pump pulley Water pump

Pontiac GP water pump replacement - 0996b43f80209765.jpg Water pump assembly mounting-3.1L
Install or connect the following:

Water pump with a new gasket and torque the bolts to 89 inch lbs. (10 Nm) Water pump pulley and torque the bolts to 18 ft. lbs. (25 Nm) Accessory drive belt Drive belt guard
Fill the cooling system.
Start the engine and check for leaks.

Sepentine belt route:


Posted on Jun 02, 2010

  • 1 more comment 
  • GetMeOttaHere Jun 02, 2010

    Grand Prix

  • mickputter Jun 02, 2010

    I cannot get the four bolts off that are around the pulley covering the water pump( do I jam a breaker bar in between the pulleys?), this is what I mean about detailed instructions each step do this to remove. Take this off and then this I am not a mechanic here so a little patience will be appreciated

  • GetMeOttaHere Jun 03, 2010

    I know Pontiac has a tool that fits right inside this area. There are no exact details for a job like this, but if you need to use a breaker bar to allow you to remove or at least loosen these bolts, then yes,you can use a breaker bar. I have actually modified many wrenches to access area on many vehicles,just to get a job done. Don't rush it, approach this job with patience.



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  1. Disconnect the negative battery cable.
  2. Remove the air cleaner assembly.
  3. If necessary for access, remove the coolant recovery reservoir.
  4. Partially drain the coolant, into a suitable container, to a level below the water pump.
  5. If equipped, remove the serpentine belt guard/cover.
  6. Remove the serpentine belt.
  7. Remove the retaining bolts, then remove the water pump pulley.
  8. Unfasten the 5 water pump attaching bolts, then remove the water pump and gasket. Discard the gasket.
To install:
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  6. Refill the cooling system with the specified type and amount amount of engine coolant.
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