GM Service Manual Online
For 1990-2009 cars only

Water Pump Replacement VIN C

Removal Procedure

Tools Required

J 38816-1A Water Pump Remover/Installer

  1. Drain the cooling system. Refer to Cooling System Draining and Filling .
  2. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls
  3. Remove the water pump belt cover.

  4. Object Number: 69920  Size: SH
  5. Remove the water pump drive belt.
  6. Remove the bypass hose.

  7. Object Number: 69919  Size: SH
  8. Remove the lower radiator hose from the thermostat housing.

  9. Object Number: 69918  Size: SH
  10. Remove the bolts from the water pump cover.
  11. Remove the water pump cover.

  12. Object Number: 69917  Size: SH
  13. Remove the water pump, the pump seal, and the gasket from the housing using the J 38816-1A . Turn the tool clockwise in order to remove the water pump.
  14. Remove the water pump from the vehicle.
  15. Clean the water pump and the pump cover sealing surfaces.

Installation Procedure

Tools Required

J 38816-1A Water Pump Remover/Installer


    Object Number: 69917  Size: SH

    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.

  1. Install the water pump using J 38816-1A . Turn the tool counterclockwise in order to install the pump.
  2. Tighten
    Tighten the water pump to 100 N·m (74 lb ft).


    Object Number: 69918  Size: SH
  3. Install the water pump housing cover and the bolts.
  4. Tighten
    Tighten the water pump housing cover bolts to 10 N·m (89 lb in).


    Object Number: 69919  Size: SH
  5. Install the lower radiator hose to the thermostat housing.

  6. Object Number: 69920  Size: SH
  7. Install the thermostat bypass hose.
  8. Install the water pump drive belt.
  9. Install the water pump belt cover.
  10. Install the air cleaner intake duct . Refer to Air Cleaner Inlet Duct Replacement in Engine Controls.
  11. Refill the cooling system. Refer to Cooling System Draining and Filling .

Water Pump Replacement VIN 1

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the A/C compressor splash shield.
  3. Drain the cooling system. Refer to Cooling System Draining and Filling .
  4. Remove the supercharger drive belt. Refer to Drive Belt Replacement .
  5. Remove the drive belt. Refer to Drive Belt Replacement .
  6. Remove the coil pack. Position the coil pack out of the way.
  7. Remove the supercharger belt tensioner. Refer to Drive Belt Tensioner Replacement .
  8. Remove the engine mount. Refer to Engine Mount Replacement .
  9. Remove the power steering pump.
  10. Remove the engine mount bracket. Refer to Engine Mount Bracket Replacement .
  11. Remove the idler pulley. Refer to Drive Belt Idler Pulley Replacement .
  12. Remove the water pump pulley.
  13. Remove the water pump.

  14. Object Number: 46178  Size: SH
  15. Clean all of the gasket mating surfaces.

Installation Procedure


    Object Number: 46178  Size: SH
  1. Using a new gasket, install the water pump on the engine.
  2. 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.

  3. Install the water pump bolts.
  4. Tighten

        • Tighten the bolts (1) to 15 N·m (11 lb ft).
        • Tighten the bolts (2) to 30 N·m (22 lb ft).
  5. Install the water pump pulley.
  6. Install the idler pulley. Refer to Drive Belt Idler Pulley Replacement .
  7. Install the engine mount bracket. Refer to Engine Mount Bracket Replacement .
  8. Install the power steering pump.
  9. Install the engine mount. Refer to Engine Mount Replacement .
  10. Install the supercharger belt tensioner. Refer to Drive Belt Tensioner Replacement .
  11. Install the coil pack. Position the coil pack out of the way.
  12. Install the drive belt. Refer to Drive Belt Replacement .
  13. Install the supercharger drive belt.
  14. Refill the cooling system. Refer to Cooling System Draining and Filling .
  15. Install the A/C compressor splash shield.
  16. Connect the negative battery cable.
  17. Check for coolant leaks.