Valve Seat

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. Install a new cylinder head if measurements are not within specification.
^ Measure the intake valve seat width.
^ Measure the exhaust valve seat width.

Valve-Seat Runout





1. Check valve seat runout.
^ Verify that the runout is within specification.