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Water Pump Cleaning and Inspection

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Water Pump, Housing & O-Ring
    GM663772Courtesy of GENERAL MOTORS CORP.
  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 2: View Of Water Pump Inspection Areas
    GM663773Courtesy 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. Replace the water pump if any damage is found.
    12. Fig 3: View Of Water Pump, Housing & O-Ring
    GM663772Courtesy of GENERAL MOTORS CORP.
  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. CAUTION: Refer to Fastener Caution .
  15. Install the water pump to water pump housing bolts. 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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