Removal Procedure
- Remove the intake manifold. Refer to
Intake Manifold Replacement
.
- Remove the engine valley cover bolts (506).
- Remove the engine valley cover (555), gasket (556), and
the O-rings (537) from the cover.
- Remove the oil pressure sensor and washer as required.
- Discard the old gaskets and O-rings. DO NOT reuse. Use NEW gaskets and
O-rings ONLY.
Installation Procedure
Important: All gasket surfaces should be free of oil
and other foreign material during assembly.
- Lubricate the O-ring seals with clean engine oil.
- Install the O-rings (537) to the cover (555).
Notice: Refer to Fastener Notice in the Preface section.
- Install the cover (555), gaskets (556), and bolts (506).
Tighten
Tighten the cover bolts to 25 N·m (18 lb ft).
- Apply sealant GM P/N 12346004 (Canadian P/N 10953480)
or equivalent to the threads of the sensor.
- Install the oil pressure sensor and sealing washer.
Tighten
Tighten the sensor to 20 N·m (15 lb ft).
- Install the intake manifold. Refer to
Intake Manifold Replacement
.