VALVE RECONDITIONING CONTINUED
6. Measure OD of valve stems (Figure 6, Item 1) at various locations along guide bearing area, and at each
location take several readings around circumference. If readings are below minimum permissible stem
diameter dimension, discard valve.
7. Intake and exhaust valve minimum permissible stem diameter dimension is 0.4335 in. (11.011 mm).
Figure 6. Checking Valve Stem OD.
8. Check valve stem (Figure 7, Item 1) straightness. If stem "runout" is more than 0.001 in. (0.03 mm), discard
9. New valves must also be checked for straight stems and face runout as they may have been damaged in
shipment or by handling.
Figure 7. Checking Valve Stem Straightness and Face Runout.