Cleaning Procedure
Notice: Do not immerse the water pump in solvent. The solvent may enter the
water pump's permanently lubricated bearings and cause premature bearing failure.
- Remove the old gasket material from the water pump sealing surfaces.
Refer to
Replacing Engine Gaskets
.
- Clean all excess dirt and debris from the water pump housing.
Inspection Procedure
- Inspect the exterior of the water pump for the following:
| • | Damage to the water pump hub bolt threads (1) for the water
pump pulley |
| • | Excessive side-to-side play in the pulley shaft (2). If
the shaft end play exceeds 0.381 mm (0.015 in), replace
the water pump. |
| • | Leakage at the water pump weep hole (3). A stain around
the weep hole is acceptable. If leakage occurs (dripping) with the engine
running and the cooling system pressurized, replace the water pump. |
- Inspect the interior of the water pump for the following:
| • | Damage to the water pump gasket sealing surface (1) |
| • | Damage, corrosion or restrictions to the engine coolant passages (2) |
| • | Excessive side-to-side play in the pulley shaft (3). If
the shaft end play exceeds 0.381 mm (0.015 in), replace
the water pump. |
| • | Damage to the water pump bolt holes (4) |
| • | Damage, corrosion or restrictions to the water pump impeller (5) |
- Rotate the pump shaft by hand and inspect for roughness of operation.
| • | If the hub wobbles, is noisy, or feels rough when rotated, replace
the water pump. |
| • | The shaft and fan hub must turn straight and smoothly. |
- Repair or replace the water pump as necessary.
