Under vacuum, oil is sucked in from the oil sump through a mesh filter: oil receiver by a gear oil pump and fed into the oil filter.
The purified oil enters the oil line of the cylinder block and from it is supplied to the main bearings of the crankshaft, to the connecting rod bearings, and through the channels in the cylinder head to the camshaft bearings. When the oil temperature is above 95°C, the thermostat valve opens and the oil is diverted to the radiator for cooling.
Oil pump
The gear-type oil pump is driven by the idle gear. A pressure reducing valve is located in the cover of the oil pump.
Zazir between gear teeth, mm:
- nominal: 0.05;
- maximum allowable: 0.20.
Gap between the outer diameter of the gears and the bore in the pump housing, not more than, mm; 0.15.
The length of the pressure reducing valve spring under load 7.2-8.8 kg s, mm: 39
Oil pressure in the lubrication system at a crankshaft speed of 2000 rpm (oil temperature 80°C), not less», kg/cm2: 2.0
Note. Since July 1985 and due to the installation of hydraulic valve lifters on the OS, OT and 0Z engines, the length of the oil pump gears has been increased from 26 to 30 mm.
Oil pressure sensor
The oil pressure sensor closes the power circuit of the control lamp in the instrument cluster when the oil pressure in the lubrication system drops to 0.3-0.6 kg / cm2.
Oil filter
An oil filter with a replaceable filter element is connected in series with the main engine oil line.
Brand and type of filter element: Mann W 719/5 or Purflux LS 115.
Engine oil
Lubrication system capacity, l:
- YP engine: 3.0 (including 0.5 l in oil filter);
- other engines: 3.5 (including 0.5 l in oil filter).
Oil used: SAE 5W20, 10W40, 15W40, 20W40, 15W50 or 20W40; API SE.
Oil change interval: every 15,000 km with oil filter change.
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