Water Pump: Service and Repair

Water Pump Replacement

Removal Procedure
1. Drain the cooling system.





2. Loosen the water pump pulley bolts.
3. Remove the cooling fan and clutch assembly.
4. Remove the drive belt.
5. Remove the water pump pulley mounting bolts.
6. Remove the water pump pulley.
7. Remove the radiator outlet hose clamp from the water pump.





8. Remove radiator outlet hose from the water pump.





9. Remove the water pump mounting bolts.





10. Remove the water pump from the engine.





11. Remove the water pump gaskets.
12. Clean the water pump gasket mating surfaces.

Installation Procedure





1. Install the water pump gaskets.





2. Install the water pump to the engine.
3. Apply a sealer (GM P/N 12346004) to the bolt threads.

Notice: Refer to Fastener Notice in Service Precautions.





4. Install the water pump mounting bolts.
Tighten the mounting bolts to 41 Nm (30 ft. lbs.).





5. Install the radiator outlet hose to the water pump.





6. Install the water pump pulley.
7. Install the water pump pulley bolts.
Tighten the water pump pulley bolts to 25 Nm (18 ft. lbs.).
8. Install the drive belt.
9. Install the fan clutch assembly.
10. Fill the radiator cooling system.
11. Inspect the cooling system for leaks.