Valve Rocker Arm Cover Replacement Left

1. Remove the AIR crossover pipe, if equipped.
2. Remove the secondary air injection (AIR) pipe assembly from the exhaust manifold, if equipped. Refer to Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 1 in Engine Controls - 4.3L.



3. Remove the nuts and the engine wiring harness bracket from the upper intake manifold studs.
4. Remove the bolt holding the engine wiring harness clip to the positive battery cable junction block bracket.



5. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
6. Move and secure the engine wiring harness with the engine wiring harness bracket aside.



7. Disconnect the power brake booster vacuum hose from the intake manifold and the vacuum brake booster.



8. Remove the PCV valve hose assembly from the intake manifold and the valve rocker arm cover.
9. Remove the valve rocker arm cover. Refer to Valve Rocker Arm Cover Removal (Left) .
10. Clean all sealing surfaces and the valve rocker arm cover. Refer to Valve Rocker Arm Cover Clean and Inspect .

1. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Installation (Left) .



2. Install the PCV valve hose assembly to the intake manifold and the valve rocker arm cover.



3. Connect the power brake booster vacuum hose to the intake manifold and the vacuum brake booster.



4. Reposition the engine wiring harness.

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.

5. Install the engine wiring harness bracket and the nuts to the lower intake manifold studs.

Tighten
Tighten the engine wiring harness bracket nuts to 12 N·m (106 lb in).

6. Install the bolt for the engine wiring harness clip to the positive battery cable junction block bracket.

Tighten
Tighten the engine wiring harness clip nut to 9 N·m (80 lb in).




7. Connect the ECT sensor electrical connector.



8. Install the AIR pipe assembly to the exhaust manifold, if equipped. Refer to Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 1 in Engine Controls - 4.3L.
9. Install the AIR crossover pipe, if equipped.

Valve Rocker Arm Cover Replacement Right

1. Disconnect the PCV hose from the air cleaner outlet duct.
2. Remove the air cleaner outlet duct from the throttle body and the air cleaner assembly. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 4.3L.



3. Disconnect the secondary air injection (AIR) pipe assembly from the AIR crossover pipe and the AIR pump, if equipped.
4. Remove the AIR pipe assembly from the exhaust manifold, if equipped. Refer to Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 2 in Engine Controls - 4.3L.



5. Remove the heater hose bracket bolt.
6. Move and secure the heater hoses out of the way.
7. Move and secure the engine wiring harness out of the way.
8. Remove the right valve rocker arm cover. Refer to Valve Rocker Arm Cover Removal (Right) .
9. Clean all sealing surfaces and the valve rocker arm cover. Refer to Valve Rocker Arm Cover Clean and Inspect .

1. Install the right valve rocker arm cover and bolts. Refer to Valve Rocker Arm Cover Installation (Right) .



2. Reposition the engine wiring harness.
3. Reposition the heater hoses.

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.

4. Install the heater hose bracket bolt.

Tighten
Tighten the bracket bolt to 25 N·m (18 lb ft).




5. Install the AIR pipe assembly to the exhaust manifold. Refer to Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 2 in Engine Controls - 4.3L.
6. Connect the AIR pipe assembly to the AIR pump and the AIR crossover pipe.
7. Install the air cleaner outlet duct to the throttle body and the air cleaner assembly. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 4.3L.
8. Install the PCV hose to the air cleaner outlet duct.