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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Mechanical - 5.7L (LS6)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Water Pump Cleaning and Inspection

Water Pump Cleaning and Inspection

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  1. Remove the old gasket from the water pump sealing surfaces. Refer to Replacing Engine Gaskets .
  2. Clean all dirt and debris from the water pump housing.
    Fig 1: Identifying Water Pump, Mounting Bolts & Gaskets
    GM309751Courtesy of GENERAL MOTORS CORP.
  3. Inspect the water pump for the following:
    • Gasket sealing surfaces for excessive scratches or gouging
    • Hose sealing surfaces for scratches or gouging
    • Restrictions within the internal coolant passages
    • Excessive side-to-side play in the pulley shaft
    • A loose belt pulley or a pulley with excessive wear or scoring on the belt tracking area
    • Leakage at the water outlet housing or rear cover gasket
    • Leakage at the water pump vent hole

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