The oil filter is attached on the right to the oil level sensor (from the oil pallet) on the block of cylinders. The case of the filter is manufactured of plastic. The sensor of pressure of oil is installed on the adapter of an oil filter. The mesh adapter with a polymeric grid in the middle is made of easily utilized material. The drain opening serves in the lower part of the filter for replacement of an oil filter. The oil cooler with water cooling is used for reduction in the rate of degradation of engine oil. Besides, for the oil cooler the special adapter of an oil filter was manufactured, (engines of the LF and L3 models).

Fig. 2.43. Oil filters of the Mazda 3 cars: 1 – block of cylinders; 2 – oil level sensor; 3 – laying; 4 – oil filter; 5 – cover of an oil filter; 6 – adapter of an oil filter; 7 – oil pressure sensor; 8 – sealing ring; 9 – oil cooler; 10 – to an output branch pipe; 11 – to the thermostat

Fig. 2.44. The principle of work of the oil filter established on L8 model engines: 1 – oil filter; 2 – cover of an oil filter; 3 – safety valve; 4 – case of an oil filter; 5 – normally; 6 – unloading; 7 – spring; 8 – oil pressure; 9 – oil channel