Valve Visual Inspection Procedure

1. Inspect the valve for damage from the head to tip for the following conditions:
^ Pitting in the valve seat area (1).
^ Lack of valve margin (2).
^ Bending in the valve stem (3).
^ Pitting or excessive wear in the stem (4).
^ Worn valve key grooves (5).
^ Worn valve tip (6).

2. Replace the valve if any of these conditions exist.