- Inspect the water pump pulley for damage at the belt contact area (1) and the pulley-to-water pump mounting surface.
Important: Do not immerse the water pump in solvent. The solvent may enter the permanently lubricated water pump bearings and cause premature bearing failure.
- Clean all excess dirt and debris from the water pump housing.
- Inspect the water pump for the following conditions:
| • | Leakage at the hose fitting (1) |
| • | 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 (2) for excessive scratches or gouging |
| • | Restrictions within the internal coolant passages (6) |
| • | Excessive side-to-side play in the pulley shaft |
| • | If the shaft end play exceeds 0.381 mm (0.015 in), replace the water pump. |
| • | Rotate the pump shaft by hand and inspect for operation roughness. |
| - | 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 (4) |
| • | Damage to the fan clutch mounting threads (5) |
