Rocker Arm Shaft Assembly: Inspection
- Place rocker arm shaft on "V" blocks and check runout at center of shaft. Maximum runout should not exceed .008" (.20 mm). A slight amount of runout can be corrected with a press. DO NOT apply heat. Replace shaft if runout is greater than .016" (.41 mm).
- Measure rocker arm shaft diameter at rocker arm locations. Replace shaft if diameter is less than .801" (20.35 mm). Measure inside diameter of rocker arms. If difference of 2 measurements is greater than .008" (.20 mm), replace either rocker arms or shaft. Replace rocker arms if valve stem contact area is scored or worn.