Rocker Arm and Shaft Disassembly, Reassembly, and Inspection

NOTE:
Identify each part as it is removed so that each item can be reinstalled in its original location.
Inspect the rocker arm shaft and the rocker arms.
If reused, the rocker arms must be installed in the their original locations.
Bundle the exhaust rocker arms with rubber bands to keep them together as a set.
Remove the rocker shaft bolt before removing the intake rocker shaft from the No. 5 rocker shaft holder.
When replacing the exhaust rocker arm assembly, remove the fastening hardware from a new exhaust rocker arm assembly.


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8290_3.0_enu_15126038_2.0

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These parts have inspection items.

Intake Rocker Arm Assembly

1. Intake Rocker Shaft Cap - Remove


2. Rocker Shaft Holder - Remove


3. Intake Rocker Arm Assembly - Remove


4. Intake Rocker Shaft - Remove


Exhaust Rocker Arm Assembly

1. Exhaust Rocker Shaft Cap - Remove


2. Exhaust Rocker Shaft - Remove


3. Thrust Washer - Remove


4. Exhaust Rocker Arm Assembly - Remove


5. Lost Motion Assembly - Remove



NOTE:
When reassembling the intake rocker arm assembly, loosely tighten the rocker shaft bolt.
If reused, the rocker arms must be installed in their original locations.
Bundle the exhaust rocker arms with rubber bands to keep them together as a set, and remove the bands after the exhaust rocker arms have been installed.
Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to all contact points, the bearing surface, and the lost motion assembly.
When replacing the exhaust rocker arm assembly, remove the fastening hardware from the new exhaust rocker arm assembly.


1


8290_3.0_enu_15126039_2.0

*1
These parts have inspection items.

Intake Rocker Arm Assembly

1. Intake Rocker Shaft - Install


2. Intake Rocker Shaft Cap - Install


3. Intake Rocker Arm Assembly - Install


4. Rocker Shaft Holder - Install


Exhaust Rocker Arm Assembly

1. Lost Motion Assembly - Install


2. Exhaust Rocker Arm Assembly - Install


3. Thrust Washer - Install


4. Exhaust Rocker Shaft - Install


5. Exhaust Rocker Shaft Cap - Install


1. Rocker Arm and Rocker Shaft - Inspect
1.
Measure the diameter of the rocker shaft at the first rocker location.
2.
Zero the gauge (A) to the rocker shaft diameter.
3.
Measure the inside diameter of the rocker arm, and check it for an out-of-round condition.
Rocker Arm-to-Shaft Clearance
Standard (New):
0.018?0.059 mm (0.00071?0.00232 in)
Service Limit:
0.080 mm (0.00315 in)
4.
Repeat for all rocker arms and both shafts. If the clearance is beyond the service limit, replace the rocker shaft and all out of service limit rocker arms. If any VTEC rocker arm needs replacement, replace the rocker arms (primary, mid, and secondary), as a set.

2. VTEC Rocker Arm - Inspect
VTEC Rocker Arms
1.
Inspect the rocker arm pistons (A). Push on each piston manually. If it does not move smoothly, replace the rocker arm set.
NOTE: Apply new engine oil to the rocker arm pistons when reassembling.