Valve Rocker Arm, Shaft, and Push Rod Replacement

Valve Rocker Arm, Shaft, and Push Rod Replacement

Removal Procedure




1. Remove the valve rocker arm lower cover - right side. Refer to Valve Rocker Arm Lower Cover Replacement - Right Side (Valve Rocker Arm Lower Cover Replacement - Right Side)
2. Remove the valve rocker arm lower cover - left side. Refer to Valve Rocker Arm Lower Cover Replacement - Left Side (Valve Rocker Arm Lower Cover Replacement - Left Side)
3. Loosen the valve clearance lock nuts on each rocker arm.
4. Loosen the valve clearance adjusting screw on each rocker arm in order to relieve tension on the valvetrain.




5. Remove the rocker arm shaft assembly bolts in the sequence shown. Leave the bolts in the rocker arm shaft brackets.




6. Remove the rocker arm shaft assembly from the cylinder head.




7. Remove the valve bridge pins.
8. Remove the valve bridges.
9. Remove the pushrods.




10. Remove the rocker arm shaft bracket bolts (1), if necessary.
11. Remove the bracket (12), rocker arm (11), and spring (10), if necessary.
12. Remove the remaining rocker arms, springs, and brackets, if necessary.
13. If required, clean and inspect the valve rocker arm and shaft. Refer to Valve Rocker Arm and Shaft Cleaning and Inspection (61. Valve Rocker Arm and Shaft Cleaning and Inspection).

Installation Procedure




1. Lubricate the rocker arm shaft (7) and the inside of the rocker arms with clean engine oil, if necessary.
2. Install the rocker arm bracket (12) and bolt (1) on one end of the rocker arm shaft, if necessary.
3. Install the intake rocker arm (9), spring (10), exhaust rocker arm (11), and bracket (12) with bolt (1). Continue in the same sequence to the last bracket, if necessary.
4. Push the bracket (12) to compress the springs and then install the bolt (1), if necessary.




5. Lubricate the top of the valves, the valve bridge stem, the valve lifter bridge, and the valve spring caps with clean engine oil.
6. Install the valve bridge.
7. Install the valve bridge pins.
8. Lubricate the valve lifter end of the pushrod with clean engine oil.
9. Install the pushrods.
To ensure the pushrod is properly installed, gently pull up on the pushrod. Resistance should be felt from the pushrod trying to lift the valve lifter.





Caution: The pushrods must be correctly seated in the valve lifter and valve rocker arms before the rocker arm shaft assembly is torqued into place. Improper seating of the pushrods can cause damage to the pushrods or the valve rocker arm shaft assembly components.

10. Install the rocker arm shaft assembly.





Caution: Refer to Fastener Caution (Fastener Caution).

11. Tighten the rocker arm shaft bolts in the sequence shown.

Tighten the bolts to 41 Nm (30 lb ft).

12. Adjust the valve clearance. Refer to Valve Clearance Adjustment (Adjustments).
13. Install the valve rocker arm lower cover - right side. Refer to Valve Rocker Arm Lower Cover Replacement - Right Side (Valve Rocker Arm Lower Cover Replacement - Right Side).
14. Install the valve rocker arm lower cover - left side. Refer to Valve Rocker Arm Lower Cover Replacement - Left Side (Valve Rocker Arm Lower Cover Replacement - Left Side)