Water Pump Replacement LA3, LY9

1. Drain the cooling system. Refer to Cooling System Draining and Filling .
2. Remove the timing belt cover. Refer to Timing Belt Cover Replacement in Engine Mechanical-2.6L and 3.2L.



3. Remove the water pump bolts.

Important: Use a catch basin to collect escaping coolant.

4. Remove the water pump and seal.

Do not reuse the seal.

5. Clean the water pump mating surfaces.
6. Clean and inspect the water pump. Refer to Water Pump Cleaning and Inspection in Engine Mechanical-2.6L and 3.2L.

1. Coat the seal ring of the water pump with silicone grease, GM P/N 12345579 (Canadian P/N 1974984) or equivalent.

Important: Ensure the O-ring seal is properly positioned to the water pump.

2. Install the O-ring seal to the water pump.



3. Install the water pump into the engine block.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the water pump bolts.

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

5. Install the timing belt cover. Refer to Timing Belt Cover Replacement in Engine Mechanical-2.6L and 3.2L.
6. Fill the cooling system. Refer to Cooling System Draining and Filling .