Oil filter device (VAZ-2109)

The oil filter is used to clean the oil from harmful impurities that have a significant impact on the acceleration of engine parts wear. The quality of the oil in the engine does not remain constant. The oil receives products of wear of parts, carbon particles that appear as a result of its combustion in the engine cylinders. It becomes clogged with resinous substances formed at high temperatures of parts.

The oil filter is screwed onto the nipple and pressed against the annular flange on the cylinder block. The tightness of the connection is ensured by a gasket installed between the filter cover and the block flange. Oil enters the filter through channel 9 (see figure 36) and, having passed through filter element 18, enters the main oil line of the cylinder block.

The filter has an anti-drain valve 16, which prevents oil from draining from the system when the engine is stopped, and a bypass valve 21, which is triggered when the filter element is clogged and bypasses oil past the filter into the oil line.

Oil filtration is performed by paper element 18. When changing the engine oil, the filter must be replaced to ensure effective oil filtration.