Rocker Arm Assembly
- With rocker arm assembly removed, remove rocker shaft retaining screw. There are three different configurations of rocker arms and supports, mark of identify components to be sure that they are installed in original position. Remove support bolts, and slide off rocker arms, springs and supports.
- Measure clearance of rocker arms on shafts, if clearance exceeds 0.002" (0.05 mm) for 8 R-C engines or 0.003" (0.08 mm) for 18R-C engines, rocker arm bushings or shafts must be replaced. Replace rocker arm bushings using a suitable mandrel (09222-30010) and an arbor press.
- New bushing must be reamed to correct clearance for shaft. Correct clearance between rocker arms and shafts is 0.0012 - 0.0015" (0.030 - 0.038 mm) for 8R-C engines and 0.0007 - 0.0020" (0.017 - 0.051 mm) for 18R-C engines.
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