Water Pump: Service and Repair

REMOVAL PROCEDURE





1. Remove the coolant from the radiator.
2. Remove the drive belt.
3. Remove upper fan shroud.
4. Remove the fan.
5. Remove the fan clutch assembly.
6. Remove the water pump drive pulley.





7. Remove the water pump attaching nuts and bolts.
8. Remove the water pump.





9. Remove the water pump gasket.
10. Inspect, to make sure all parts are free of burs or other imperfections, replace as necessary.
11. Clean all of the 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 attaching bolts.
^ Tighten the water pump attaching bolts to 25 Nm (18 ft. lbs.).





5. Install the water pump drive pulley.
6. Install the cooling fan and clutch assembly.
7. Install the multiple ribbed accessory drive belt.
8. Install the upper fan shroud.
9. Fill the radiator with the specified coolant and concentration.
10. Inspect the cooling system for leaks.