
Hydraulic pushers of the engine ZMZ-406, ZMZ-405, made in the form of cylindrical pushers and located between the camshaft and valves, combine two functions: transferring force from the camshaft to the valves and eliminating gaps in their drive

Replacing the front crankshaft seal
A sign of the need to replace the front crankshaft oil seal is an oil leak through its edge

Loosen bolt 1 two to three turns
Unscrew the adjusting bolt 2, loosen the belt tension and remove it