REMOVAL & INSTALLATION
See Figures 1, 2, and 3
Before the valve rocker assembly can be reached, it is necessary to lever off the clip that retains the valve cover and remove the valve cover. Remove the rocker arm retaining nuts, the rocker arm shaft, and the rocker arms. Remove the stud seals.
Before installing the rocker arm mechanism, be sure that the parts are as clean as possible. Install new stud seals. On Types 1, 2/1600 and 3, install the rocker shaft assembly with the chamfered edges of the rocker shaft supports pointing outward and the slots pointing upward. On Type 4 and Type 2/1700, 2/1800 and 2/2000 models, the chamfered edges must point outward and the slots must face downward. The pushrod tube retaining wire must engage the slots in the rocker arm shaft supports as well as the grooves in the pushrod tubes. Tighten the retaining nuts to the proper torque. Use only the copper colored nuts that were supplied with the engine. Make sure that the ball ends of the pushrods are centered in the sockets of the rocker arms. Adjust the valve clearance on models without hydraulic lifters. Install the valve cover using a new gasket.