Cylinder Head: Overhaul Honda S2000 AP1

Rocker Arm and Shaft Disassembly/Reassembly

Note. Identify parts as they are removed to ensure reinstallation in their original locations. Inspect rocker shafts and rocker arms (see ROCKER ARM AND SHAFT INSPECTION ). Rocker arms must be installed in the same position, if reused. Prior to reassembling, clean all the parts in solvent, dry them, and apply new engine oil to any contact points. Bundle the rocker arms with rubber bands to keep them together as a set. When replacing the VTEC rocker arm assembly, remove the fastening hardware from the new VTEC rocker arm assembly.

Scheme 190

Scheme 191

Scheme 192

Scheme 193

1. Remove the rocker arm assembly (see «CYLINDER HEAD INSPECTION FOR WARPAGE»(ref-221322-S23128584762006022400000) ).
2. Disassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(ref-221322-S00369422372006022400000) ).
3. Measure the diameter of the shaft at the first rocker location.
4. Zero the gauge (A) to the shaft diameter.
5. Measure the inside diameter of the rocker arm, and check it for an out-of-round condition. Rocker Arm-to-Shaft Clearance: Standard (New): 0.021-0.041 mm (0.0008-0.0016 in.) Service Limit: 0.07 mm (0.003 in.)
6. Repeat for all rocker arms and both shafts. If the clearance is over the limit, replace the rocker shaft and all over-tolerance rocker arms. If any rocker arm needs replacement, replace all three rocker arms in that set (primary, mid, and secondary).
7. Inspect the rocker arm synchronizing pistons (A). Push each piston manually. If it does not move smoothly, replace the rocker arm assembly. NOTE: When reassembling the primary rocker arm (B), carefully apply air pressure to its oil passage. Apply new engine oil to the pistons when reassembling.
8. Reassemble the rocker arm assembly (see «ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY»(ref-221322-S00369422372006022400000) ).
9. Install the rocker arm assembly (see «ROCKER ARM ASSEMBLY INSTALLATION»(ref-221322-S34587172072006022400000) ).