Oil is sucked from the engine crankcase through the mesh filter of the oil receiver and is pumped by the gear oil pump into the oil filter. Cleaned oil enters the oil line of the cylinder block and from there is supplied to the main bearings of the crankshaft, to the connecting rod bearings, and through the channels in the cylinder head - to the bearings of the camshaft.
The lubrication system of the engines of the models "RP". "ABS", "RV" and "2E" include an oil cooler (Fig. 2-31).
Fig. 2-31. Lubrication system parts:
I - engine "RV";
II - engines "EZ" and "YAR".
1 — intermediate shaft;
2 — oil seal;
3 - guide flange;
4 - intermediate shaft toothed pulley;
5 — oil pump drive gear;
6 — bushing;
7 - oil pump;
8 — oil receiver;
9 — oil dipstick;
10 - oil filter;
11 — heat exchanger;
12 — nipple;
13 — oil filter bracket;
14 — gasket.
The gear-type oil pump is driven by the intermediate shaft gear via a shaft located coaxially with the ignition distributor sensor drive shaft. A pressure-reducing valve is installed in the oil pump cover.
Oil pressure in the system at an oil temperature of 80°C at idle: minimum 0.3 kgf/cm², nominal 1.6-2.0 kgf/cm², for "AGG" engines 1.0-2.0 kgf/cm²; at a crankshaft speed of 2000 rpm: minimum 1.8 kgf/cm², nominal 2 kgf/cm². Opening pressure of the pressure reducing valve 5.7-6.7 kgf/cm².
The Mann W 719/5 oil filter with replaceable filter element is connected in series with the main oil line of the engine. The filter element is replaced with each engine oil change.
The lubrication system includes two oil pressure warning light sensors, one of which is mounted on the cylinder block, and the other on the oil filter bracket. On "AGG" engines, both sensors are mounted on the heat exchanger bracket. The operation of the sensors is controlled by a special electronic unit. In the event of an emergency drop in oil pressure, an audible signal is activated.
Oil pressure indicator lamp switch-on pressure, kgf/cm²:
- sensor with a brown insulator when the engine is idling: < 0.3 (for engine "AGG" 0.15-0.45);
- sensor with a white insulator at a crankshaft speed of 2100 rpm: < 1.8.
To remove and install the oil pump, drain the oil from the engine sump. Remove the lower cover of the clutch sump. Place the jack under the subframe. Loosen the subframe mounting bolts. Lower the jack slightly. Remove the oil sump. Loosen the bolts securing the oil pump to the cylinder block. Remove the oil pump.
When installing, make sure that the drive protrusion engages correctly with the drive shaft. Tighten the oil pump mounting bolts to the cylinder block. Install the oil pan. Install the lower clutch housing cover. Fill the lubrication system with engine oil.
Note: The oil pump can be removed directly from the vehicle.
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