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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1020 (Engine Mechanical - 6.6L (LLY)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Water Pump Cleaning and Inspection

Water Pump Cleaning and Inspection

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the O-ring from the water pump and discard.
  2. Remove the water pump to water pump housing bolts.
  3. Remove the water pump from the water pump housing.
  4. Remove the O-ring from the water pump housing and discard.
    5. Fig 1: View Of Water Pump Housing & O-Ring
    GM663772Courtesy of GENERAL MOTORS CORP.
  5. Clean the water pump assembly.
  6. Clean the water pump mating surfaces.
  7. Inspect the water pump gear for damage.
  8. Inspect the water pump mating surfaces for damage.
  9. Inspect the water pump shaft for looseness.
  10. Inspect the water pump assembly for damage.
    11. Fig 2: View Of Water Pump Housing & O-Ring Inspection Areas
    GM663773Courtesy of GENERAL MOTORS CORP.
  11. Replace the water pump if any damage is found.
  12. Install a new O-ring to the water pump housing.
  13. Lubricate the O-ring with engine coolant.
  14. Install the water pump to the water pump housing.
    15. Fig 3: View Of Water Pump Housing & O-Ring
    GM663772Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  15. Install the water pump to water pump housing bolts.

    Tighten:  Tighten the water pump to water pump housing bolts to 21 N.m (15 lb ft).

  16. Install a new O-ring to the water pump.
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