In this schematic the "Cotter, Valve" is used most often.
The most expensive part in this assembly is the Arm,upper Rocker.
Parts such as the E-6 Valve-upper Rocker Arm: Arm,upper Rocker, Seal,valve Stem, Screw,tappet Adj, Valve,in. are included in the Cx400e 1982 (c) E-6 Valve-upper Rocker Arm parts fiche.