• | Gasket and hose sealing surfaces for excessive scratches or gouging |
• | Restrictions within the internal coolant passages |
• | Excessive side-to-side play in the pulley shaft |
• | Leakage at the water outlet housing or rear cover |
• | Leakage at the water pump vent hole |
• | A stain around the vent hole is acceptable. If leakage, dripping, occurs with the engine running and the cooling system pressurized, replace the water pump. |
• | Wear or damage in the belt tracking area of the pulley |