Important: Crank the engine until the mark on the crankshaft balancer is at the 2 o'clock position.

Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.



2. Remove the valve rocker arm cover from the cylinder head. Refer to Valve Rocker Arm Cover Replacement .




Notice: All valve train components must be reassembled in the exact order and position from which they were removed.

3. Remove the shaft bolts from the valve rocker arm shaft.



4. Remove the valve rocker arm shaft with the valve rocker arms.
5. Disassemble the valve rocker arms from the valve rocker arm shaft. Refer to Valve Rocker Arm and Shaft Disassemble




Important: The push rods must be reinstalled in the original direction as disassembly. This is because the push rods have different degrees of hardness at each end. A paint stripe identifies the upper end of the push rod. If the paint stripe is not visible, mark the push rods on the upper end as the push rods are removed.

6. Remove the push rods from the engine block.
7. Inspect each of the valve train components. Refer to Valve Rocker Arm and Shaft Clean and Inspect .
8. Clean the valve rocker arm covers. Refer to Valve Rocker Arm Cover Clean and Inspect .

Important: Lubricate the valve rocker arms with clean engine oil before installing.

1. Assemble the valve rocker arm shafts. Refer to Valve Rocker Arm and Shaft Assemble

Notice: Install the valve pushrods with the copper-colored, painted, or marked end up in order to avoid damage or premature wear.

2. Install the push rods to the engine block, with the painted or marked end UP.




Notice: Improper installation of the valve rocker arm shaft bolts may cause valve rocker arm shaft breakage and piston to valve contact.

3. Install the valve rocker arm shaft to the cylinder head.




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 bolts to the valve rocker arm shaft.

Tighten
Alternately tighten the bolts to 55 N·m (40 lb ft).




5. Install the valve rocker arm cover to the cylinder head. Refer to Valve Rocker Arm Cover Replacement .
6. Connect the negative battery cable.