Lubrication system — general information (Mazda6 GG (Atenza) 2002-2008: Power unit: Lubrication system)

The lubrication system works under pressure, the oil passes through the oil filter. Mazda engines are equipped with an environmentally friendly oil filter with a replaceable filter element. Lubrication system - with full-flow oil cleaning and oil supply under pressure to the main moving parts and engine assemblies. The system consists of an oil sump, a gear oil pump with an oil receiver, a full flow oil strainer, an oil pressure switch and oil valves. The oil pump draws oil from the engine sump and delivers it to the oil filter. There is a bypass valve on the pressure side of the oil pump. If the oil pressure is too high, the valve opens and some of the oil flows back into the engine sump. Through the middle of the oil filter element, clean oil enters the main oil line. When the filter becomes clogged, a bypass valve located in the oil filter housing supplies unfiltered oil directly to the main oil line. There is a non-return valve in the oil filter pipe, which prevents the oil passages and hydraulic valve lifters of the engine from emptying. Channels for lubricating the crankshaft bearings depart from the main oil line. Through inclined holes in the crankshaft, oil is supplied to the connecting rod bearings, and from there it is sprayed onto the piston pins and cylinders. At the same time, oil is supplied through ascending channels to the cylinder head and ensures lubrication of the camshaft bearings and the operation of hydraulic tappets.

The oil sump is made of laminated steel with a high damping factor. The LF and L3 engines also have an oil/water oil cooler.

Attention! On vehicles equipped with engines with a catalytic converter, it is necessary to ensure that the oil level on the dipstick is not above the maximum mark. If too much oil has been poured into a car with a catalytic converter, the excess must be removed from the crankcase by draining or suction (special vacuum pump), otherwise unburnt oil will enter the exhaust system and may destroy the catalytic converter.

Table 2.13. Specifications of the lubrication system

Table 2.14. Recommended engine oil

Pic. 2.38. The working components of the Mazda 6 lubrication system: 1 – chain tensioner spring; 2 - chain tensioner; 3 - oil pump; 4 - chain guide; 5 – chain of the oil pump; 6 – an asterisk of the oil pump; 7 - oil pan; 8 - mesh oil filter; 9 - gasket; 10 - oil spray nozzle valve; 11 - oil filter adapter; 12 - oil pressure sensor; 13 - oil filter; 14 - oil filter cover; 15 - drain plug of the oil filter; 16 - sealing ring; 17 - engines of models LF and L3; 18 - oil cooler

Pic. 2.39. Lubrication systems for L8 and LF engines: 1 - camshaft; 2 – a head of the block of cylinders; 3 - block of cylinders; 4 - oil spray nozzle valve; 5 - crankshaft; 6 - oil filter; 7 - oil filter bypass valve; 8 - oil pump; 9 - mesh oil filter; 10 - oil pan; 11 - drained oil; 12 - chain tensioner; 13 – engine model LF; 14 - oil cooler; 15 - to the oil filter; 16 - from the oil pump; 17 - oil pressure sensor; 18 - hole; 19 - piston; 20 - main bearing; 21 - crankshaft bearing, connecting rod bearing; 22 - safety valve; 23 - vertical projection; 24 - side view

Pic. 2.40. Lubrication systems for L3 engines: 1 - camshaft; 2 – a head of the block of cylinders; 3 - block of cylinders; 4 - oil spray nozzle valve; 5 - crankshaft; 6 - oil filter; 7 - oil filter bypass valve; 8 - oil pump; 9 - mesh oil filter; 10 - oil pan; 11 - drained oil; 12 - chain tensioner; 13 - oil cooler; 14 - oil pressure sensor; 15 - hole; 16 - piston; 17 - main bearing; 18 - crankshaft bearing, connecting rod bearing; 19 - safety valve; 20 - vertical projection; 21 – side view; 22 - balancing shaft; 23 - oil control valve (OCV); 24 - actuator for changing the valve timing; 25 - oil filter (inner front engine cover)