Water Pump Cleaning and Inspection
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Refer to SAFETY GLASSES CAUTION
.
- Remove the old gasket material from the water pump sealing surfaces.
- Clean all the dirt and any debris from the water pump.
- Inspect the water pump for the following:
- Leakage or damage to the housing cover or gasket (1)
- Excessive scratches or gouging to the gasket sealing surfaces (2)
- Leakage from the water pump vent hole (3)
A stain around the vent hole is acceptable. If leakage occurred (dripping) with the engine operating and the cooling system pressurized, then replace the water pump.
- Damaged bolt hole threads (4)
- Excessive side-to-side movement of the water pump shaft (5)
- Leakage around the water inlet pipe (6)
- Leakage around the heater hose pipe (7)
- Restrictions within the internal coolant passages