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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 907 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement (4.3L) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the water pump gaskets.
    Fig 1: Installing Water Pump Gaskets
    G01978187Courtesy of GENERAL MOTORS CORP.
  2. Install the water pump to the engine.
    Fig 2: Installing Water Pump To Engine
    G01978188Courtesy of GENERAL MOTORS CORP.
  3. Apply a sealer (GM P/N 12346004) to the bolt threads.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  4. Install the water pump mounting bolts.

    Tighten 

    Tighten the mounting bolts to 41 N.m (30 lb ft).

    Fig 3: Installing Water Pump Mounting Bolts
    G01978189Courtesy of GENERAL MOTORS CORP.
  5. Install the radiator outlet hose to the water pump.
    Fig 4: Installing Radiator Outlet Hose
    G01978190Courtesy of GENERAL MOTORS CORP.
  6. Install the water pump pulley.
  7. Install the water pump pulley bolts.

    Tighten 

    Tighten the water pump pulley bolts to 25 N.m (18 lb ft).

  8. Install the drive belt. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical - 4.3L.
  9. Install the fan clutch assembly. Refer to FAN CLUTCH REPLACEMENT  .
  10. Fill the radiator cooling system. Refer to DRAINING AND FILLING COOLING SYSTEM  .
  11. Inspect the cooling system for leaks.
    Fig 5: Installing Water Pump Pulley
    G01978191Courtesy of GENERAL MOTORS CORP.
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