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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 688 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement (4.3L Engine) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. If reusing the fasteners, apply sealant GM P/N United States 12346004, GM P/N Canada 10953480, or equivalent to the threads of the water pump bolts.
  2. Install NEW water pump gaskets and the water pump.
  3. Install the water pump bolts. Tighten the water pump bolts to 45 N.m (33 lb ft).
  4. Using J 41240  to hold the water pump pulley, install the water pump pulley bolts. Tighten the water pump pulley bolts to 25 N.m (18 lb ft).

    Important:  After assembly, the hose clamp tangs (water pump end) must point forward and the upper tang should be level with the outside diameter of the water pump inlet hose.

  5. Install the water pump inlet hose.
  6. Position the water pump inlet hose clamps.
  7. Install the radiator outlet hose to the water pump.
  8. Install the radiator outlet hose to the surge tank.
  9. Position the radiator outlet hose clamps at the surge tank and water pump.
  10. Install the drive belt.
  11. Install the cooling fan. Refer to Fan Replacement .
  12. Align the hinge clip with the lip on the throttle body. In order to install the air cleaner outlet duct, pivot the air cleaner outlet duct downward until the mounting stud is through the hole.
  13. Install the air cleaner adapter nut.
  14. Install the PCV hose.
  15. Tighten the air cleaner outlet duct clamp at the MAF/IAT sensor.
  16. Fill the cooling system. Refer to Draining & Filling Cooling System .
  17. Inspect the cooling system for leaks.
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