Water Pump: Service and Repair

Water Pump Replacement

Removal Procedure





1. Drain the cooling system.
2. Remove the fan clutch assembly.
3. Loosen the water pump pulley bolts.
4. Remove the drive belt.
5. Remove the water pump drive pulley bolts.
6. Remove the water pump drive pulley





7. Remove the radiator inlet hose clamp from the water pump.
8. Remove the radiator inlet hose from the water pump.





9. Remove the water pump mounting bolts.
10. Remove the water pump.





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

Installation Procedure





1. Install the water pump gasket to the engine.





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 water pump mounting bolts to 25 Nm (18 ft. lbs.).





5. Install the water pump pulley.
6. Install the water pump pulley bolts.
^ Tighten the water pump pulley bolts to 25 Nm (18 ft. lbs.).





7. Install the radiator inlet hose to the water pump.
8. Install the radiator inlet hose clamp to the water pump.
9. Fill the cooling system.
10. Inspect the cooling system for leaks.