Engine lubrication system — general information (VAZ-21061)

The lubrication system is combined - under pressure and splash. Under pressure, the main and connecting rod bearings of the crankshaft, the supports of the camshaft and the auxiliary drive shaft, the camshaft cams and the bushing of the oil pump drive gear are lubricated. The oil flowing out of the gaps and splashed by the moving parts lubricates the cylinder walls, pistons with piston rings, piston pins in the bosses, the timing chain, the supports of the valve drive levers, as well as the valve stems in their guide bushings. The oil pressure on a warmed-up engine at an average crankshaft speed is 3.5–4.5 kgf/cm²; When the oil pressure drops to 0.4–0.8 kgf/cm², the low pressure indicator lights up in the instrument cluster. The lubrication system includes: an oil pump, an intake pipe with a filter mesh attached to the pump body; full flow oil filter mounted on the left side of the engine; filling neck with lid; oil level indicator (dipstick) in the crankcase; low oil pressure sensor connected to the warning light.

The oil pump is a gear type with helical gears to reduce oil pressure pulsation, is installed inside the crankcase and is attached to the cylinder block with two bolts. The drive gear is fixedly fixed on the shaft. The driven gear rotates freely on the axis pressed into the pump body. An oil intake pipe with a filter mesh and a built-in pressure-reducing valve is attached to the pump body, which is pressed by a spring to the pump cover. The valve actuation pressure is provided by a spring of appropriate elasticity.



The oil filter is full-flow, non-separable, equipped with a bypass and anti-drain valve.

The crankcase ventilation system is closed, forced, with gas extraction through an oil separator.

The fuel, cooling and exhaust systems are described in the relevant chapters.

The dimensions of the main mating parts of the engine and the limits of permissible wear during operation are given at the end of the chapter.

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