Water Pump: Service and Repair

Water Pump Replacement (LZ4/LZ9)

Removal Procedure




1. Drain the cooling system. Refer to Draining and Filling Cooling System (LY7, LZ4, LZ9 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) Draining and Filling Cooling System (LE5 Static Fill) .
2. Loosen the water pump pulley bolts.
3. Remove the drive belt.
4. Remove the water pump pulley bolts and pulley.




5. Remove the water pump bolts.
6. Remove the water pump and gasket.
7. Clean the water pump mating surfaces.

Installation Procedure




1. Position a NEW water pump gasket and the water pump to the engine front cover.
Notice: Refer to Fastener Notice .

2. Install the water pump bolts.

Tighten the bolts to 10 N.m (89 lb in).




3. Install the water pump pulley and bolts.
4. Install the drive belt.
5. Tighten the water pump pulley bolts.

Tighten the bolts to 25 N.m (18 lb ft).

6. Fill the cooling system. Refer to Draining and Filling Cooling System (LY7, LZ4, LZ9 Static Fill) Draining and Filling Cooling System (GE 47716 Fill) Draining and Filling Cooling System (LE5 Static Fill) .
7. Inspect for leaks.