The lubrication system consists of an oil pan, an oil pump, an oil filter and various channels. The oil pump is driven by the crankshaft. The bypass valve in the oil pump maintains the pressure in the engine lubrication system at a certain level. If it is exceeded, the bypass valve opens and part of the oil flows back into the oil pan. The filter has a bypass valve, through which, in the event of severe contamination of the filter, the crude oil enters directly into the oil line.
The oil purified by the oil filter enters the main oil line. Next, the oil flow is divided into two streams. One stream of oil is supplied to the main bearings of the crankshaft, and through the drilled channels lubricates the connecting rod bearings. To cool the pistons, oil is sprayed through sprayers onto the bottom of the pistons.
The second oil flow is channeled to the cylinder head to lubricate the camshaft bearings and to the hydraulic tappets.
After passing through the head and cylinder block, the oil drains into the oil pan.