- Install NEW valve rocker arm cover grommets and use NEW valve rocker arm cover bolts if they are serviced with the grommet.
- Install a new gasket to the valve rocker arm cover. Ensure that the gasket is properly seated in the groove of the valve rocker arm cover.
- Apply sealer GM P/N 12378521 (Canadian P/N 88901148), or equivalent to the joint surfaces (1) where the cylinder head and intake manifold meet.
- Install the valve rocker arm cover.
- Install the valve rocker arm cover bolts.
- Install the PCV fresh air tube (533).
- Install the PCV fresh air tube clip (534) and bolt (535).
Important: All gasket-mating surfaces need to be free of oil and foreign material. Use P/N 12378392 or equivalent to clean surfaces.
Important: Apply sealant GM P/N 12378521 (Canadian P/N 88901148), or equivalent, at the cylinder head to lower intake manifold joint.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
Tighten the valve rocker arm cover bolts to 10 N·m (89 lb in).
Tighten
Tighten the PCV fresh air tube bolt to 10 N·m (89 lb in).
