Measure the rocker arm I.D. (Item 1) [Figure 70-70-42] with the inside micrometer.
Measure the rocker arm shaft O.D. (Item 2) [Figure 70-70-42] with a outside micrometer.
If the clearance exceeds the allowable limit, replace the bushing.
If the clearance still exceeds the allowable limit after the bushing is replaced, replace the rocker arm shaft.
