Valve Seat: Testing and Inspection

Inspect the contact surface of each valve seat and valve face for roughness or damage.

If necessary, resurface the valve seat with a 45 degree valve seat cutter and resurface the valve seat.

Use the following procedure for inspecting the valve seat:
1. Apply a thin coat of Prussian Blue to the valve face.
2. Inspect the valve seating by pressing the valve against the seat.

If the blue does not appear 360 degrees around the valve face, replace the valve.

If blue does not appear 360 degrees around the valve seat, resurface the seat.