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Home >> Buick >> 2008 >> Allure CXL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 5.3L) >> Repair Instructions - Off Vehicle >> Water Pump Cleaning and Inspection

Water Pump Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Water Pump Pulley
    GM1602762Courtesy of GENERAL MOTORS CORP.
  1. Clean all excess dirt and debris from the water pump housing.
  2. Inspect the water pump for the following conditions:
    • Gasket sealing surfaces for excessive scratches or gouging
    • Excessive side-to-side play in the pulley shaft
    • Leakage at the water pump vent hole

      A stain around the vent hole is acceptable. If leakage, dripping, occurs with the engine running and the cooling system pressurized, replace the water pump.

    • Wear or damage in the belt tracking area of the pulley (1)
  3. Fig 2: Identifying Water Manifold
    GM1602764Courtesy of GENERAL MOTORS CORP.
  4. Inspect the water manifold for the following conditions:
    • Damage to threaded bolt holes (1)
    • Restrictions within the internal passages (2, 3)
    • Gasket sealing surfaces (4) for excessive scratches or gouging