Figure 5.15. Lubrication system: 1 – oil filter; 2 – oil filter nipple; 3 – pressure reducing valve; 4 – oil dipstick; 5 – cylinder head cover; 6 – oil filler cap; 7 – oil pressure emergency drop indicator light sensor; 8 – oil dipstick guide tube; 9 – oil receiver; 10 – oil pump housing; 11 – oil pump drive gear; 12 – driven gear of the oil pump; 13 – oil pump cover; 14 – oil seal
The design of the lubrication system is shown in the figure 5.15.
The lubrication system is combined: the main and connecting rod bearings of the crankshaft and the camshaft bearings are lubricated under pressure; splashing - cylinder walls, pistons with piston rings, piston pins, camshaft cams, valve tappets and stems.
The system consists of an oil sump, a gear oil pump with an oil receiver 9, a full-flow oil filter 1, an oil pressure sensor 7 and oil channels.
When the oil pressure drops below the permissible level, the oil pressure warning light comes on in the instrument cluster.
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The gear oil pump, with gears 11 and 12 of internal engagement, is located on the front end of the cylinder block. The drive gear 11 of the oil pump is mounted on two flats on the front end of the crankshaft. To reduce mechanical losses, the gears have trochoidal engagement. Oil receiver 9 is bolted to the cover of the second main bearing and to the pump body. To limit the maximum pressure in the lubrication system, a pressure reducing valve 3 is installed on the pump.
Oil filter 1 full-flow, non-separable, with bypass and anti-drain valves.
The work on replacing engine oil and oil filter is described in section. "Maintenance"; removal and installation, as well as repair of the oil pump - in this subsection.