For 1990-2009 cars

Important: Prior to installing the water pump, read the entire procedure. Pay special attention to avoid part damage and to ensure proper sealing.

1. Install the water pump assembly.

Important: Do not install the front water pump bolt until after the engine front cover is on.

2. Install the water pump bolts. Finger tighten the bolts.

Notice: Refer to Fastener Notice in the Preface section.

3. Tighten the water pump bolts.

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

4. Apply sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the water pump drain plug.
5. Install the water pump drain plug, if necessary.

Tighten
Tighten the water pump drain plug to 20 N·m (15 lb ft).

6. Install the water feed tube.
7. Lubricate the feed tube O-ring with antifreeze.
8. Install the water feed tube by twisting and pushing toward the water pump. Take care not to tear or damage the O-ring.
9. Install the thermostat housing to block bolts and stud.

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

10. Install the engine coolant temperature sensor by hand.
11. Tighten the engine coolant temperature sensor.

Tighten
Tighten the engine coolant temperature sensor to 20 N·m (15 lb ft).