The engine lubrication system is combined: the most loaded parts are lubricated under pressure, while the rest are lubricated either by directed spraying or spraying of oil flowing from the gaps between mating parts. The lubrication system is pressurized by a gear oil pump mounted externally at the front of the cylinder block and driven from the front end of the crankshaft.
The pump sucks oil from the engine oil sump through an oil receiver with a strainer and through a full-flow oil filter with a replaceable porous paper filter element delivers it to the main oil line located in the body of the cylinder block on the left side. Oil supply channels to the main bearings of the crankshaft depart from the main line. Oil is supplied to the connecting rod bearings through the channels made in the body of the crankshaft, and then through the channels in the rods of the connecting rods - to the holes in their upper part, through which it is sprayed onto the cylinder walls and piston bottoms.
To lubricate the camshaft bearings, oil from the vertical channel enters the central axial channels of the camshafts through a radial hole in the neck of the third bearing and is distributed through them to the rest of the bearings.
The camshaft cams are lubricated with oil coming from the central axial channels through the radial holes in the cams. Excess oil is drained from the head of the block into the oil sump through vertical drainage channels.
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