GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 38816-A Water Pump Remover & Installer
    • J 38185 Hose Clamp Pliers

Removal Procedure

  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the upper filler panel. Refer to Filler Panel Replacement - Upper in Body Front End.
  3. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-4.6L.
  4. Remove the secondary AIR injection control valve. Refer to Secondary Air Injection Shutoff Valve Replacement - Bank 2 in Engine Controls-4.6L.
  5. Remove the oil level indicator tube nut.

  6. Object Number: 500271  Size: SH
  7. Remove the water pump belt shield fasteners.
  8. Remove the water pump belt shield.


    Object Number: 52983  Size: SH
  9. Remove the water pump drive belt (4).

  10. Object Number: 71141  Size: SH
  11. Position the J 38185 to the clamp in order to remove the radiator outlet hose from the thermostat housing.

  12. Object Number: 69918  Size: SH
  13. Remove the water pump cover bolts.
  14. Remove the water pump cover.
  15. Disconnect the heater return hose.

  16. Object Number: 637030  Size: SH
  17. Position the J 38816-A to the water pump locking ears.
  18. Fasten the support plate to the water housing crossover, to ensure proper engagement of the tool to the water pump locking ears.
  19. Using the J 38816-A , turn the pump clockwise in order to remove the pump from the housing.
  20. Remove the support plate from the water housing crossover.

  21. Object Number: 69917  Size: SH
  22. Remove the water pump from the vehicle.
  23. Remove the seal from the water crossover.
  24. Clean the sealing surfaces of the water housing crossover and the pump cover.
  25. Clean and inspect the water pump. Refer to Water Pump Cleaning and Inspection in Engine Mechanical 4.6L-Unit Repair.

Installation Procedure


    Object Number: 69917  Size: SH
  1. Insert the seal into the recessed portion of the water crossover.

  2. Object Number: 430127  Size: SH

    Important: The notched locking ear (1) must be in the 7 o'clock position.

  3. Index the water pumps locking ears with the tangs in the water crossover.

  4. Object Number: 637030  Size: SH
  5. Position the J 38816-A to the water pump locking ears.
  6. Fasten the support plate to the water housing crossover, to ensure proper engagement of the tool to the water pump locking ears.
  7. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  8. Turn the J 38816-A counterclockwise.
  9. Tighten
    Tighten the water pump to 100 N·m (74 lb ft).

  10. Remove the support plate from the water housing crossover.

  11. Object Number: 69918  Size: SH
  12. Connect the water pump cover to the heater return hose.
  13. Install the water pump cover to the water housing crossover.
  14. Install the water pump cover bolts.
  15. Tighten
    Tighten the water pump cover bolts to 10 N·m (89 lb in).


    Object Number: 71141  Size: SH
  16. Position the J 38185 to the clamp in order to connect the radiator outlet hose to the thermostat housing.

  17. Object Number: 52983  Size: SH
  18. Install the water pump drive belt (4).

  19. Object Number: 500271  Size: SH
  20. Place the water pump belt shield in position.
  21. Install the water pump belt shield fasteners.
  22. Tighten
    Tighten the water pump belt shield fasteners to 10 N·m (89 lb in).

  23. Install the oil level indicator tube nut.
  24. Tighten
    Tighten the oil level indicator tube nut to 10 N·m (89 lb in).

  25. Install the secondary AIR injection control valve. Refer to Secondary Air Injection Shutoff Valve Replacement - Bank 2 in Engine Controls-4.6L.
  26. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement in Engine Controls-4.6L.
  27. Install the upper filler panel. Refer to Filler Panel Replacement - Upper in Body Front End.
  28. Fill the cooling system. Refer to Cooling System Draining and Filling .