Rocker Arms and Shaft Inspection

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.
Rocker Arm-to-Shaft Clearance:
Standard (New):
Intake: 0.017 - 0.050 mm (0.0007 - 0.0020 inch)
Exhaust: 0.018 - 0.054 mm (0.0007 - 0.0021 inch)
Service Limit: 0.08 mm (0.003 inch)
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 VTEC intake rocker arm needs replacement, replace both rocker arms in that set (primary and secondary).





5. Inspect the rocker arm piston (A). Push it manually. If it does not move smoothly, replace the rocker arm set.

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