The engine crankcase ventilation system consists of hoses of a sufficiently large cross section connecting the engine crankcase to the cylinder head cover, and the engine air supply system, pressure control valve and oil separator.
Engine crankcase ventilation system forced closed type. Ventilation ensures the suction of crankcase gases and fuel vapors from the crankcase into the engine inlet pipeline, which eliminates the increase in pressure in the crankcase due to the penetration of exhaust gases into it and their release into the atmosphere.
Maintenance of the elements of the crankcase ventilation system consists mainly in checking the patency of the hoses and, if necessary, cleaning them.