Installation Procedure

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

1. Install NEW knock sensor oil seals (1) into the valley cover (2).

   Lubricate the seal surfaces with clean engine oil.

   Fig 1: Installing New Knock Sensor Oil Seals

   Courtesy of GENERAL MOTORS CORP.
2. If equipped with the 5.7 L, RPO LS6 engine, install the engine valley cover and a NEW gasket.
   Fig 2: Installing Engine Valley Cover And A New Gasket (LS6 Engine)

   Courtesy of GENERAL MOTORS CORP.
3. If equipped with the 5.7 L, RPO LS1 engine, install the engine valley cover and NEW gasket.
   Fig 3: Installing Engine Valley Cover And New Gasket (LS1 Engine)

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Refer to FASTENER NOTICE .
4. Install the engine valley cover bolts.

   Tighten 

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

5. Install the knock sensors.

   Tighten 

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

   Fig 4: Installing Knock Sensors

   Courtesy of GENERAL MOTORS CORP.
6. Connect the knock sensor wire harness electrical connectors.
   Fig 5: Connecting Knock Sensor Wire Harness Electrical Connectors

   Courtesy of GENERAL MOTORS CORP.
7. Install the rubber grommets into the valley cover.
8. Install the intake manifold. Refer to INTAKE MANIFOLD REPLACEMENT  .