Hydraulic Valve Lifter Adjustment: Notes

Repeated valve (seat and face) reconditioning operations will decrease valve stem to rocker arm clearance to point that if compensation is not made, valve lifters will cease to function. To compensate for any dimensional changes in valve mechanism, a 0.060" shorter or a 0.060" longer replacement push rod is available. To determine whether or not a longer or shorter push rod is necessary, clearance between rocker arm and valve stem must be checked.

Use suitable tool and slowly collapse valve lifter until plunger is bottomed. Hold lifter down while checking clearance. Procedure for checking valve clearances is as follows:

1. Rotate crankshaft until No. 1 piston is at TDC (point "A", see Figure) after compression stroke as indicated by timing mark on crankshaft damper and pointer. Make a chalk mark on damper 180° (point "B") from TDC mark. Make a chalk mark on damper 90° (point "C") clockwise from TDC mark.
2. With damper at point "A", check following valve clearances with specifications: