| • | 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, dripping, with the engine running and the cooling system pressurized, replace the water pump. |