Rocker Arm Assembly: Testing and Inspection

INSPECTION
VALVE ROCKER ARM AND ROCKER SHAFT





1. Measure the inner diameter of valve rocker arm and outer diameter of valve rocker shaft, and determine the difference (oil clearance) between the two values.
2. If the oil clearance exceeds the standard value, replace the valve rocker arm or shaft, whichever shows greater amount of wear.
Rocker arm inside diameter: 22.020 - 22.041 mm (0.8669 - 0.8678 inch)
Rocker shaft diameter: 21.987 - 22.000 mm (0.8656 - 0.8661 inch)
3. If the cam or valve contact surface of valve rocker arm is worn or dented excessively, replace the valve rocker arm.
4. Check that the valve rocker arm roller rotates smoothly. If not, replace the valve rocker arm.