Engine Valley Cover Installation

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Knock Sensor Oil Seals & Valley Cover

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: All gasket surfaces should be free of oil or other foreign material during assembly.

Install NEW knock sensor oil seals (520) into the valley cover (555).
Lubricate the seal surfaces with clean engine oil.

Fig 2: View Of Engine Valley Cover, Gasket & Bolts

Courtesy of GENERAL MOTORS CORP.

Install the valley cover and NEW gasket.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the valley cover bolts.
Tighten: Tighten the valley cover bolts to 25 N.m (18 lb ft).

Fig 3: View Of Knock Sensors

Courtesy of GENERAL MOTORS CORP.

Install the knock sensors.
Tighten: Tighten the knock sensors to 20 N.m (15 lb ft).

Fig 4: View Of Knock Sensor Wire Harness

Courtesy of GENERAL MOTORS CORP.

Install the knock sensor wire harness.