Rocker Arm and Shaft Disassembly, Reassembly, and Inspection

Rocker Arm and Shaft Disassembly, Reassembly, and Inspection

Disassembly

1. Rocker Arm Assembly - Disassembly

NOTE:
* Identify parts as they are removed so they can be reinstalled in their original locations.
* Inspect the rocker shaft and the rocker arms.
* When removing, or installing the rocker arm assembly, do not remove the camshaft holder bolts. The bolts will keep the holders and the rocker arms on the shaft.
* Remove the rocker shaft bolt before removing the rocker shaft from the No. 5 rocker shaft holder.
* Bundle the intake and the exhaust rocker arms with rubber bands to keep them together as a set, and remove the bands after the intake and exhaust rocker arms have been installed.





Inspection

1. Tubes, Hoses, and Connectors After Installation Check





1. Measure the diameter of the shaft at the first rocker location.





2. Zero the gauge (A) to the shaft diameter.

3. Measure the inside diameter of the rocker arm, and check it for an out-of-round condition.











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 intake secondary rocker arm needs replacement, replace the rocker arms (primary and secondary) as an assembly.

2. VTEC Rocker Arm - Inspection





VTEC Rocker Arms

1. Inspect the rocker arm pistons (B). 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.
* When reassembling secondary rocker arm A, carefully apply air pressure to the oil passage of the rocker arm.

Reassembly

1. Rocker Arm Assembly - Reassembly

NOTE:
* If reused, the rocker arms must be installed in their original locations.
* When removing, or installing the rocker arm assembly, do not remove the camshaft holder bolts. The bolts will keep the holders and the rocker arms on the shaft.
* Bundle the intake and the exhaust rocker arms with rubber bands to keep them together as a set, and remove the bands after the intake and 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 rocker arm assembly, remove the fastening hardware from the new rocker arm assembly.