Valve Seat Inspection

VALVE SEAT INSPECTION

Valve and Seat Refacing Measurements

Caution
^ After grinding valves or valve seats, check valve clearance.





1. Check intake valve seat and intake valve angles.

Note
^ The finished valve seat should contact the approximate center of the valve face.





2. Check exhaust valve seat and exhaust valve angles.





3. Measure the valve seat width. If necessary, grind the valve seat to specification.
4. Check that the finished valve seat contacts the approximate center of the valve face.
(1). Coat the valve seat with Prussian Blue.
(2). Set the valve in place.
(3). Rotate the valve with light pressure.
(4). Inspect the Prussian Blue transferred to the valve and grind the valve or valve seat as necessary.





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