The hydraulic pushers of the ZMZ-406, ZMZ-405 engines, made in the form of cylindrical pushers and located between the cam shaft and the valves, combine two functions: transmitting force from the cam shaft to the valves and eliminating gaps in their drive.
The steering mechanism is installed on the left side member and secured through a bracket with bolts and nuts
If an oil leak through the oil pan gasket cannot be eliminated by tightening its mounting bolts, it means that the gasket is severely deformed and must be replaced.