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Home >> Hummer >> 2003 >> H2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 603 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: All gaskets surfaces are to be free of oil or other foreign material during assembly.
    Fig 1: View Of Water Pump, Gaskets & Bolts
    GM260121Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  1. Install the water pump and NEW gaskets.
  2. Install the water pump bolts.

    Tighten: 

    1. Tighten the water pump bolts a first pass to 15 N.m (11 lb ft).
    2. Tighten the water pump bolts a final pass to 30 N.m (22 lb ft).

    3. Fig 2: View Of Heater Inlet Hose At Water Pump
    GM660665Courtesy of GENERAL MOTORS CORP.
  3. Install the heater inlet hose to the water pump.
  4. Position the heater inlet hose clamp at the water pump.
    5. Fig 3: View Of Surge Tank Outlet Hose To Water Pump
    GM659180Courtesy of GENERAL MOTORS CORP.
  5. Install the surge tank outlet hose to the water pump.
  6. Position the surge tank outlet hose clamp at the water pump.
    7. Fig 4: View Of Outlet Hose & Water Pump
    GM659509Courtesy of GENERAL MOTORS CORP.
  7. Install the outlet hose to the water pump.
  8. Position the outlet hose clamp at the water pump.
  9. Install the accessory drive belt. Refer to Drive Belt Replacement - Accessory in Engine Mechanical - 6.0L (LQ4).
  10. Install the fan blade. Refer to Fan Replacement .
    11. Fig 5: View Of Inlet Hose & Water Pump
    GM659418Courtesy of GENERAL MOTORS CORP.
  11. Install the inlet hose to the water pump.
  12. Position the inlet hose clamp at the water pump.
    13. Fig 6: View Of Vent Inlet Hose At Throttle Body
    GM659465Courtesy of GENERAL MOTORS CORP.
  13. Install the engine vent inlet hose to the radiator hose clips.
    14. Fig 7: MAF/IAT Sensor & Air Cleaner Assembly
    GM832908Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Align the arrow at the throttle body end of the duct with the throttle body attaching stud.
  14. Install the air cleaner outlet duct.
  15. Install the radiator inlet hose clip to the outlet duct.
  16. Tighten the air cleaner outlet duct clamps at the following locations:
    • Throttle body
    • MAF/IAT sensor

      Tighten:  Tighten the air cleaner outlet duct clamp screws to 7 N.m (62 lb in).

  17. Fill the cooling system. Refer to Draining and Filling Cooling System .
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