Design features of the engine lubrication system (Chevrolet Aveo T300)

The engine lubrication system is combined: the most loaded parts are lubricated under pressure, and the rest are lubricated either by directed splashing or by splashing oil flowing out of the gaps between the mating parts. The pressure in the lubrication system is created by a gear oil pump installed outside in the front part 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 mesh filter and through a full-flow oil filter with a replaceable filter element made of porous paper feeds it into the main oil line located in the cylinder block body on the left side. From the main line, oil supply channels to the crankshaft main bearings branch off. Oil is fed to the connecting rod bearings through channels made in the crankshaft body, and then through channels in the connecting rods - to 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 journal of the third bearing and is distributed through them to the remaining 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 cylinder head into the oil pan through vertical drainage channels.