Removal Procedure
- Remove the drive belt. Refer to Drive Belt Replacement .
- Remove the generator. Refer to Generator Replacement in Engine Electrical.
- Remove the generator bracket. Refer to Generator Bracket Replacement in Engine Electrical.
- Disconnect the engine right side spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.4 L.
- Disconnect the vacuum hoses from the evaporative emissions (EVAP) canister purge solenoid valve.
- Remove the EVAP canister purge solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls - 3.4L.
- Remove the ignition module bracket with the coils.
- Remove the vacuum hose from the grommet in the engine right side valve rocker arm cover.
- Remove the valve rocker arm cover bolts.
- Remove the valve rocker. Bump the end of the valve rocker arm cover with the palm of your hand or a soft rubber mallet if the cover adheres to the cylinder head.
- Trim the valve cover gasket and sealant away from lower intake manifold gasket at the cylinder head to lower intake manifold joints (1).
- Remove the valve cover gasket.
- Clean the sealing surface on the cylinder head with degreaser.
- Clean the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection in the Engine Unit Repair Manual.
Notice: Valve rocker arm cover gasket and sealant must be carefully trimmed away from lower intake manifold gasket. Failure to do so will damage the lower intake manifold gasket, causing a severe oil leak.
Important: When removing the valve rocker arm cover, make sure the gasket stays in place attached to the cylinder head.
Installation Procedure
- Apply sealant at the cylinder head to lower intake manifold joint (1).
- Install the valve rocker arm cover gasket into the valve rocker arm cover. Ensure that the gasket is properly seated in the groove of the valve rocker arm cover.
- Install valve rocker arm cover.
- Install the valve rocker arm cover bolts.
- Install the vacuum hose to the grommet in the engine right side valve rocker arm cover.
- Install the ignition module bracket with the coils.
- Install the EVAP canister purge solenoid valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement in Engine Controls - 3.4L.
- Connect the vacuum hoses from the EVAP canister purge solenoid valve.
- Connect the engine right side spark plug wires. Refer to Spark Plug Wire Replacement in Engine Controls - 3.4L.
- Install the generator bracket. Refer to Generator Bracket Replacement in Engine Electrical.
- Install the generator. Refer to Generator Replacement in Engine Electrical.
- Install the drive belt. Refer to Drive Belt Replacement .
Important: All gasket mating surfaces need to be free of oil and foreign material. Use GM P/N 12346139 (Canadian P/N 10953463) 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 bolts to 10 N·m (89 lb in).
