Rocker Arm Assembly

Rocker Arm Assembly Removal





1. Loosen the adjusting screws (A).





2. Remove the bolts and the rocker arm assembly.
-1 Unscrew the rocker shaft mounting bolts two turns at a time, in a crisscross pattern, to prevent damaging the valves or rocker arm assembly.
-2 When removing the rocker arm assembly, do not remove the rocker shaft mounting bolts. The bolts will keep the springs and the rocker arms on the shafts.

Rocker Arms and Shafts Disassembly/Reassembly





NOTE:
- Identify parts as they are removed so they can be reinstalled in their original locations.
- Inspect the rocker shafts and rocker arms.
- Rocker arms must be installed in the same positions if reused.
- When removing or installing the rocker arm assembly, do not remove the rocker shaft mounting bolts. The bolts will keep the springs and rocker arms on the shaft.
- Bundle the intake rocker arms with rubber bands to keep them together as a set.
- Prior to reassembling, clean all the parts in solvent, dry them and apply lubricant to any contact points.

Rocker Arms and Shafts Inspection





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 rockers and both shafts. If the clearance is over the limit, replace the rocker shaft and all over tolerance rocker arms. If any intake rocker arm needs replacement, replace all three rocker arms in that set (primary, mid, and secondary).

VTEC Rocker Arms





5. Inspect the rocker arm pistons (A). Push them manually. If they do not move smoothly, replace the rocker arm assembly.

NOTE:
- Apply oil to the pistons when reassembling.
- When reassembling the primary rocker arm (B), carefully apply air pressure to the oil passage of the rocker arm.