Valve Seat

Valve Seat Inspection

Valve and Seat Refacing Measurements

NOTE: Refer to the appropriate Specifications.

NOTE: 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. Install a new cylinder head assembly if abnormalities are found.

Valve Seat Width

NOTE: Refer to the appropriate Specifications.

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

NOTE: Refer to the appropriate Specifications.

1. Use a valve seat runout gauge to check valve seat runout.