Rocker Arm-to-Rocker Arm Shaft Clearance

NOTE: Rocker arm-to-rocker arm shaft clearance using J 26900-1 (outside micrometer) and telescopic micrometer.

1. Measure the outside diameter of the rocker arm shaft using the outside micrometer and the inside diameter of the rocker arms using a telescopic micrometer.
^ Standard Rocker arm shaft outside diameter: 15.969 to 15.984 mm (0.6287 to 0.6293 inch).
^ Standard rocker arm shaft inside diameter: 15.985 to 16.005 mm (0.629 to 0.630 inch).
2. Subtract the outside diameter measurement of the rocker arm shaft from the inside diameter measurement of the rocker arms to determine rocker arm-to-rocker arm shaft clearance.
^ Standard rocker arm-to-rocker arm shaft clearance: 0.0011 to 0.036 mm (0.0001 to 0.0014 inch).
^ Maximum rocker arm-to-rocker arm shaft clearance: 0.09 mm (0.0035 inch).
3. If rocker arm inside diameter, rocker arm shaft outside diameter or rocker arm-to-rocker arm shaft clearance exceed specification, Replace the rocker arms and/or rocker arm shaft as necessary.