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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1776 (Engine Cooling System) >> Repair Instructions >> Water Pump Replacement (LL8) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install a new water pump gasket.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the water pump and secure the water pump with the bolts.

    Tighten: 

    • On the initial pass, tighten the bolts to 4 N.m (35 lb in).
    • On the final pass, tighten the bolts to 10 N.m (89 lb in).

    Fig 1: View Of Water Pump & Bolts
    GM637645Courtesy of GENERAL MOTORS CORP.
  3. Install the water pump pulley.
  4. Install the water pump pulley bolts.
  5. Using the J 41240  , secure the water pump pulley while tightening the water pump pulley bolts.

    Tighten:  Tighten the bolts to 25 N.m (18 lb ft).

    Fig 2: Securing Water Pump Pulley Using J 41240
    GM748318Courtesy of GENERAL MOTORS CORP.
  6. Remove the J 41240  .
  7. Install the drive belt. Refer to DRIVE BELT REPLACEMENT in Engine Mechanical - 4.2L.
  8. Install the fan and the shroud. Refer to Cooling Fan and Shroud Replacement .
  9. Fill the cooling system with the specified coolant and concentration. Refer to Draining and Filling Cooling System .
  10. Inspect for leaks.
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