Clearance Inspection

Measure the intake rocker shaft exhaust rocker shaft.





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





2. Zero the gauge 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: 0.026 - 0.067 mm (0.0010 - 0.0026 inch)
Service Limit: 0.067 mm (0.0026 inch)
Exhaust: 0.026 - 0.077 mm (0.0010 - 0.0030 inch)
Service Limit: 0.077 mm (0.0030 inch)

Repeat for all rockers.
- If the clearance is over the limit, replace the rocker shaft and all overtolerance rocker arms.

NOTE: If any intake rocker arm needs replacement, replace all three rocker arms in that set (primary, mid, and secondary).