50. Water Pump Cleaning and Inspection

Water Pump Cleaning and Inspection






1. Remove the O-ring seal from the water pump.
2. Inspect the O-ring seal for damage.
- Replace the seal if damaged.
3. Clean the water pump with a non-corrosive solvent.
4. Inspect the water pump for the following:
- Gasket sealing surfaces for excessive scratches or gouging.
- Restrictions within the internal coolant passages.
- Excessive side-to-side play in the pulley shaft.
5. Coat the O-ring seal with silicone grease, GM P/N 12345579, or equivalent.
6. Install the O-ring seal to the water pump.