Water Pump: Service and Repair

Water Pump Replacement (LS2)

Removal Procedure




1. Remove the air cleaner outlet duct.
2. Drain the cooling system. Refer to Draining and Filling Cooling System (GE 47716) Draining and Filling Cooling System (LP1, LY7 Static Fill) Draining and Filling Cooling System (LS2 Static Fill).
3. Remove the cooling fan assembly.
4. Remove the accessory drive belt.
5. Reposition the inlet and outlet hose clamps at the water pump.
6. Remove the inlet and outlet hoses from the water pump.




7. Reposition the heater inlet and surge tank outlet hose clamps at the water pump.
8. Remove the heater inlet and surge tank outlet hoses from the water pump.




9. Remove the water pump bolts.




10. Remove the water pump.
11. Remove the water pump gaskets.
12. Clean and inspect the water pump.

Installation Procedure




1. Install the water pump and gaskets to the engine block.





Notice: Refer to Fastener Notice.

2. Install the water pump bolts.

1. Tighten the water pump bolts a first pass to 15 N.m (11 lb ft).
2. Tighten the water pump bolts a final pass to 30 N.m (22 lb ft).




3. Install the heater inlet and surge tank outlet hoses to the water pump.
4. Position the heater inlet and surge tank outlet hose clamps at the water pump.




5. Install the inlet and outlet hoses to the water pump.
6. Position the inlet and outlet hose clamps at the water pump.
7. Install the accessory drive belt.
8. Install the cooling fan assembly.
9. Fill the cooling system. Refer to Draining and Filling Cooling System (GE 47716) Draining and Filling Cooling System (LP1, LY7 Static Fill) Draining and Filling Cooling System (LS2 Static Fill).
10. Install the air cleaner outlet duct.