All MAZDA 323 engines are equipped with a so-called circulating lubrication system. The oil pump sucks oil from the oil pan and supplies it to the main oil filter. On the discharge side of the oil pump there is a pressure relief valve. If the oil pressure is too high, the valve opens and some of the oil can flow into the oil pan. Through the middle of the filter cartridge, the purified oil flows into the main oil line. There is an oil pressure sensor there, which signals the driver about insufficient oil pressure. If the oil filter is clogged, the bypass valve supplies oil directly to the main oil line, bypassing the filter. In addition to the main filter, a diesel engine may also have a bypass oil filter. In this case, part of the oil flow branches off and passes through the filter. From there, the purified oil flows back into the oil pan.
The main oil line has channels for lubricating the crankshaft bearings. Oil is supplied to the connecting rod bearings through oblique holes in the crankshaft. At the same time, oil flows through ascending oil lines to the cylinder head and lubricates the camshaft bearings, rocker arms and valve stem ends. Some MAZDA 323 models are additionally equipped with an oil cooler for better heat dissipation. In this case, the oil after flowing through the filter passes through an oil cooler with water cooling.
The article is copied from the website MAZBOOK.RU