Water Pump: Service and Repair

Removal Procedure





1. Drain the coolant from the radiator. Refer to Draining and Filling Cooling System.
2. Remove the drive belt. Refer to Drive Belt Replacement in Engine.
3. Remove the upper fan shroud. Refer to Fan Shroud Replacement.
4. Remove the cooling fan and clutch assembly. Refer to Fan Clutch Replacement
5. Remove the water pump drive pulley.
6. Loosen the radiator outlet hose clamp.
7. Remove radiator outlet hose from the water pump.





8. Remove the water pump attaching bolts.





9. Remove the water pump from the engine.





10. Remove the water pump gaskets.
11. Ensure that all mating surfaces are clean and free of gasket material or burrs.

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 attaching bolts.
^ Tighten the attaching bolts to 41 Nm (30 ft. lbs.).
5. Place the radiator outlet hose clamp loosely on the end of the hose.
6. Connect the radiator outlet hose to the water pump.
7. Tighten the radiator hose clamp.
^ Tighten the clamp to 2.5 Nm (22 inch lbs.).





8. Install the water pump drive pulley.
9. Install the fan clutch. Refer to Fan Clutch Replacement.
10. Install the cooling fan.
11. Install the multiple ribbed accessory drive belt. Refer to Drive Belt Replacement in Engine.
12. Install the upper fan shroud. Refer to Fan Shroud Replacement.
13. Fill the radiator with the specified coolant and concentration. Refer to Draining and Filling Cooling System.
14. Inspect the cooling system for leaks. Refer to Cooling System Leak Testing (On-Vehicle).