Valve Seat
Valve Seat InspectionValve and Seat Refacing Measurements
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
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 a valve seat runout gauge to check valve seat runout.
