CYLINDER HEAD - CONTINUED
REPAIR/ASSEMBLY - CONTINUED
Steps 49, 50, and 51 are typical for all cylinder head valves requiring refacing.
Valve refacer operating instructions are provided with the valve refacer machine.
50. Valve refacer
Insert valve stem in valve refacer chuck on
guide area of stem (2).
Check valve for out-of-round condition.
If runout exceeds 0.001 inch (0.03
mm), valve is warped. Discard valve.
Using ST-685 valve seat grinder, wet
grind valve to an exact 30-degree angle
from horizontal, just enough to reface
completely around the valve head.
If after grinding, valve head thickness
(3) Is less than 0.105 Inch (2.67
mm), discard valve.
Compare refaced valve to the following
NEW MAXIMUM WORN LIMITS
0.4500 inch (11.4300 mm)
0.105 inch (2.67 mm)
0.0625 inch (1.59 mm)