Valve Seat

Valve Seat Inspection

Valve and Seat Refacing Measurements

CAUTION: After grinding valves or valve seats, check valve clearance.

1. Check the valve head and seat.
^ Check valve angles.
^ Check margin width.
^ Be sure margin width is within specification.





2. Inspect for abnormalities on the valve face and seat.

Valve Seat Width

1. Measure the valve seat width. If necessary, grind the valve seat to specification.
^ Measure the intake valve seat width.
^ Measure the exhaust valve seat width.
^ Recheck the valve spring installed length after the seats have been ground, and shim the valve springs as necessary to achieve the correct installed spring length.





Valve Seat Runout

1. Use the Valve Seat Runout Gauge to check valve seat runout.