Valve Train: Inspection
- Push rocker arm pistons manually. If they DO NOT move smoothly, replace rocker arm assembly. Remove lost motion assembly from cylinder head and test by pushing plunger with finger. If lost motion assembly does not move smoothly, replace assembly.
- Measure diameter of intake and exhaust rocker shafts at first rocker location. Measure ID or rocker arms and check for out of round condition. Repeat for all rocker arms. If out of round condition is detected replace rocker arms. Always replace rocker arms as a set of three.