Valve Rocker Arm Cleaning and Inspection. Chevrolet Joy 2008

For 1990-2009 cars

1. Check the bending of the rocker arm shaft by using the V block and the dial gage.
2. Replace the rocker arm shaft of which the bending is over the specification.

Specification
The bending of the rocker arm shaft is 0.10 mm (0.0039 in).

3. Check the outer diameter of the rocker arm shaft using a micrometer to check the clearance between the rocker arm and the rocker arm shaft.
4. Check the inner diameter of the rocker arm using a bore gage (1).
5. If the difference is over the limit between the outer diameter and the inner diameter, replace the shaft or the rocker arm, or both if necessary.

Specification
The limit is 0.005-0.040 mm (0.0002-0.0016 in).