Valve Train Analysis - Engine Running, Rocker Arm

1. Check for plugged oil in the rocker arms or cylinder head.
2. Check for proper overhead valve train lubrication.

If insufficient oiling is suspected, accelerate the engine to 1200 RPM +/- 100 RPM with the transmission in NEUTRAL and the engine at normal operating temperature. Oil should spurt from the rocker arm oil hole such that valve tips and rocker arms are well oiled and/or, with the valve covers off, oil splash may overshoot the rocker arms. If oiling is insufficient for this to occur, check the oil passages for blockage.