Water Pump: Service and Repair
Water Pump ReplacementRemoval Procedure
Caution: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Remove the intake air resonator.
4. Remove the drive belt.
5. Remove the water pump pulley bolts.
6. Remove the water pump pulley.
7. Remove the front timing belt cover.
8. Remove the water pump bolts.
9. Remove the water pump.
10. Clean the water pump mating surfaces.
Installation Procedure
1. Coat the seal ring of the water pump with silicone grease, GM P/N 12345579 or equivalent.
2. Install the water pump.
Notice: Refer to Fastener Notice in Service Precautions.
3. Install the water pump bolts.
Tighten the water pump bolts to 25 Nm (18 ft. lbs.).
4. Inspect timing belt for serviceability.
5. Install the front timing belt cover.
6. Install the water pump pulley.
7. Install the water pump pulley bolts.
Tighten the water pump pulley bolts to 10 Nm (89 inch lbs.).
8. Install the drive belt.
9. Install the intake air resonator.
10. Connect the negative battery cable.
11. Fill the cooling system.