Rocker Arm Assembly: Testing and Inspection
Valve Rocker AssemblyINSPECTION
VALVE ROCKER ARM AND ROCKER SHAFT
1. Measure inside diameter of valve rocker arm and outside diameter of valve rocker shaft, and determine the difference between the two (= oil clearance).
Clearance between arm and shaft:
Standard 0.020 - 0.054 mm (0.0008 - 0.0021 inch)
Limit 0.10 mm (0.0039 inch)
2. If oil clearance exceeds the limit, replace 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 cam or valve contact surface of valve rocker arm is worn or dented excessively, replace valve rocker arm.
4. Check that valve rocker arm roller rotates smoothly. If not, replace valve rocker arm.