Description And Operation: Valve
The intake valve (6) is made from a one piece forged heat resistant (martensitic) steel. The exhaust valve (7) is a two piece construction with a forged (austenitic) head welded to the (martensitic) stem. Both valves have a nitrided surface treatment to prevent scuffing except at the tip and lock grooves. The four valves per cylinder are actuated by roller rocker arms, which pivot on stationary lash adjusters. All valves use three bead lock keepers (1) to retain springs (3) and to promote valve rotation.
For cylinder head (8) description and operation. Refer to CYLINDER HEAD, DESCRIPTION AND OPERATION .
For valve seal (4) description and operation. Refer to SEAL(S), VALVE GUIDE, DESCRIPTION AND OPERATION .
For valve spring and seat (5) description and operation. Refer to SPRING(S), VALVE, DESCRIPTION AND OPERATION .