Valve: Service and Repair

Fig. 36 Measuring valve stem height:

Fig. 37 Measuring valve rotator height:

Whenever a new valve is installed or after grinding valves, it is necessary to measure the valve stem height with the special tool as shown in Fig. 36.
There should be at least .015 inch clearance between the gauge and end of valve stem. If clearance is less than .015 inch, remove valve and grind end of valve stem as required.
Check valve rotator height, Fig. 37. If valve stem end is less than .005 inch above rotator, the valve is too short and a new valve must be installed.