Hydraulic compensators N62 are installed directly in the body of the cylinder head. The valves are driven by the camshaft cams through the plungers of the hydraulic tappets. The clearances in the valve drive mechanism are selected automatically by hydraulic compensators. The operating principle of the hydraulic compensators is similar to the cylindrical hydraulic tappets of the M54 engine. The free travel of the valve drive levers is no more than 0.1 mm. The basic design of the hydraulic compensator is shown in Figure 5.7.
The cylinder head contains oil channels to supply hydraulic compensators and other elements with oil.