GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Water Pump Cleaning and Inspection

Cleaning Procedure

    Object Number: 1564167 Size: SH

    Caution: Do not immerse the water pump in solvent. The solvent may enter the water pump's permanently lubricated bearings and cause premature bearing failure.

  1. Remove and discard the O-ring from the water pump.
  2. Clean all excess dirt and debris from the water pump housing.

Inspection Procedure

    Object Number: 1564169 Size: SH
  1. Rotate the water pump hub (1). The water pump hub and impeller should turn straight and smoothly. If the hub wobbles, is noisy, or feels rough when rotated, replace the water pump.
  2. Inspect the exterior of the water pump for the following:
    3. • Damage to the water pump pulley (2)
    • Damage to the water pump bolt holes (3)

    Object Number: 1564170 Size: SH
  3. Examine the water pump shaft weep holes (1, 2) in the water pump body for signs of leakage. If coolant leakage is evident, replace the water pump.

    4. Object Number: 1564173 Size: SH
  4. Inspect the interior of the water pump for the following:
    5. • Damage to the water pump O-ring sealing surface (1)
    • Damage, corrosion or restrictions to the water pump impeller (2)
    • Damage, corrosion or restrictions to the coolant passages (3)
  5. Repair or replace the water pump as necessary.