Install injector rocker arm shafts with new securing bolts and tighten, first the inner -2- and then the outer -1-, evenly and in diagonal sequence. Torque setting: 20 Nm + 1/4 turn (90°) further.
When new bucket tappets have been installed the engine must not be started for about 30 minutes. Hydraulic valve compensation elements have to settle (otherwise valves will strike pistons).