Passing through the oil filter, the purified oil enters the main oil line. It has an emergency oil pressure drop sensor, which, by turning on the warning lamp in the instrument cluster, signals low oil pressure. The oil filter has a bypass valve, through which, in the event of severe contamination of the filter, crude oil enters directly into the oil line.
From the main line, oil under pressure is supplied through the channels to lubricate the main bearings of the crankshaft and then through the channels in the crankshaft to the connecting rod bearings. To cool the pistons, oil is sprayed through nozzles onto the bottom of the pistons.
Attention! Do not fill engine oil above the mark «Max» on the index (dipstick), as unburnt oil may enter the exhaust system and damage the catalytic converter.
Through the channels, oil is supplied to the cylinder head for lubrication of the camshaft bearings and to the hydraulic tappets.
The oil pump is installed in the front cover and is driven by two flats on the shaft.
The tightness of the connection between the oil pump and the cylinder block is ensured using a silicone composite sealant paste.
Pic. 4.22. Engine front cover with oil pump: 1 - front cover with oil pump; 2 - stuffing box; 3 - crankshaft; C - pressure reducing valve; P - oil pump drive flats
The tightness between the oil pump outlet and the channel in the cylinder block is ensured using a square section gland 2 (pic. 4.22).
The oil pressure reducing valve C is located in the front cover.
The presence of an oil pressure regulator in the channel for supplying oil to the camshaft bearings serves to limit the oil pressure in the upper part of the engine.
An oil drain valve is built into the cylinder head at the level of the upward oil passage, which provides some oil reserve at the top of the engine for hydraulic tappets.
The oil pressure sensor is located on the exhaust side of the engine to the left of the engine identification plate.
The electric oil level sensor is located at the level of the oil pan on the intake manifold side of the cylinder block.
The oil filter with paper filter element is mounted on the oil/coolant heat exchanger support.