For 1990-2009 cars

1. Install the drain plug in the water pump.
2. Apply GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plug before installation.

Notice: Refer to Fastener Notice in the Preface section.

3. Install the coolant jacket plugs.

Tighten
Tighten the coolant jacket plug to 35 N·m (26 lb ft).

4. Install the rear oil passage plugs.
5. Apply GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plugs before installation.

Tighten
Tighten the oil passage plug to 60 N·m (44 lb ft).

6. Install the other oil passage plugs.
7. Apply GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the plug before installation.

Tighten
Tighten the oil passage plugs to 35 N·m (26 lb ft).

8. Lubricate the crankshaft position sensor O-ring with engine oil.
9. Install the crankshaft position sensor and bolt.

Tighten
Tighten the crankshaft position sensor bolt to 10 N·m (89 lb in).

10. Install the oil pressure switch.

Tighten
Tighten the oil pressure switch to 22 N·m (16 lb ft).

11. Install the knock sensor and bolt.

Tighten
Tighten the knock sensor bolt to 25 N·m (18 lb ft).

12. Install the piston oil squirters.
13. Install the piston oil squirter bolts.

Tighten
Tighten the piston oil squirter bolts to 15 N·m (11 lb ft).