Cylinder Head Valve Seat Reconditioning
  1. Insert the intake and exhaust valves in the head, and measure the valve stem installed height (A).
    Intake Valve Stem Installed Height
    Standard (New):
    67.2−67.4 mm (2.646−2.654 in.)
    Service Limit:
    67.7 mm (2.665 in.)
    Exhaust Valve Stem Installed Height
    Standard (New):
    58.4−58.6 mm (2.299−2.307 in.)
    Service Limit:
    58.9 mm (2.319 in.)


  1. If the valve stem installed height is beyond the service limit, replace the valve and recheck. If it is still beyond the service limit, replace the cylinder head; the valve seat in the head is too deep.