The bottom of the piston is flat without cutouts for the valves, the combustion chamber is delta-shaped, the grooves for the compression rings are rectangular.
Execution - pistons with one or two grooves under the oil-removal ring.
The piston coating is graphite-disulfide-molybdenum.
Sleeve 240-1002021
Wet type sleeve, dense structure of sleeve material, centrifugal casting.