Engine lubrication system — design description

Lubrication system

The oil pump draws engine oil from the crankcase and pressurizes it through a short passage to a full flow oil filter. The safety valve located in the pump regulates the maximum pressure generated by the pump. When the pressure created by the pump is exceeded, the valve opens and bypasses oil into the crankcase. The purified oil through the filter enters the main oil line. In the event of a clogged filter, the pressure reducing valve opens and part of the oil, without purification, is sent to the main line.

From the main line, oil flows through five small channels to the crankshaft main journals. Through diagonal holes in the crankshaft, oil enters the connecting rod journals and is then sprayed onto the cylinder walls.

From the main line, oil flows to the intermediate shaft and then to the ignition distributor. At the same time, engine oil is supplied directly to the camshaft bearings through three oil lines. From the middle bearing, through the oil spray lines, oil is supplied to all cams and levers.

Crankcase ventilation system

Through the oil separator (2) with adjustable valve (1) crankcase gases are discharged into the intake manifold. The crankcase ventilation depends on the intake air flow of the running engine. The control valve, as well as the filter in the oil plug, must be washed in fuel every 20,000 km. The valve must be replaced every 40,000 km of the vehicle.