Valve Seat
Valve - Seat InspectionValve 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 a valve seat runout gauge to check valve seat runout.