Important: 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.
- Inspect the water pump for the following:
| • | Leakage at the hose fittings (1) |
| • | Leakage at the rear cover gasket (2) |
| • | 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. |
| • | Gasket sealing surfaces for excessive scratches or gouging (4) |
| • | Restrictions within the internal coolant passages (5) |
| • | Excessive side-to-side play in the pulley shaft (6) |
| • | If shaft end play is detected, replace the water pump. |
| • | Rotate the pump shaft by hand and inspect for roughness of operation
(6) |
| - | 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. |
| • | Damage to threaded bolt holes (7) |
