Mazda 3 since 2003
1. Operation and maintenance of the car
2. Engine
2.1. General description of new engines of the L8, LF and L3 models
2.1.1. Mechanical part of engines
2.1.1.1. Cover of a head of the block of cylinders
2.1.1.2. Head of the block of cylinders
2.1.1.3. Laying of a head of the block of cylinders
2.1.1.4. Block of cylinders
2.1.1.5. Bent shaft and radical bearing
2.1.1.6. Balancing block
2.1.1.7. Principle of operation of the balancing block
2.1.1.8. Damper of tortional fluctuations of a bent shaft
2.1.1.9. Forward cover of the engine
2.1.1.10. Piston
2.1.1.11. Piston rings and piston finger
2.1.1.12. Rod and conrod bearing
2.1.1.13. The valvate mechanism – general information
2.1.1.14. Camshaft
2.1.1.15. Camshaft asterisk
2.1.1.16. Asterisk of a bent shaft
2.1.1.17. Gas distribution mechanism drive chain
2.1.1.18. Natyazhitel of a gas distribution mechanism drive chain
2.1.1.19. The valve, a valvate spring, a maslootrazhatelny cap, the directing valve plug
2.1.1.20. Valve pusher
2.1.2. Mechanism of change of phases of gas distribution
2.1.3. Lubrication system
2.1.4. Cooling system
2.1.5. Fuel system
2.1.6. System of production of the fulfilled gases and system of decrease in toxicity
2.1.7. Electric equipment of engines
2.2. Mechanical part of engines
2.3. Appendix 1
2.4. Appendix 2
2.5. Appendix 3
2.6. The Z6 engine – a mechanical part
2.7. Lubrication system
2.8. Cooling system
2.9. System of an admission
2.10. Fuel system
2.11. System of production of the fulfilled gases and system of decrease in toxicity
2.12. System of ignition
2.13. Control system
2.14. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
 








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2.1.1.5. Bent shaft and radical bearing

Fig. 2.8. Crankshafts of engines of the L8, LF and L3 models: 1 – leading gear wheel


Crankshafts of engines of the L8 and LF models – pig-iron 5-basic with 4 counterbalances. The L3 model engine crankshaft – pig-iron 5-basic with 8 counterbalances. The leading gear wheel of the drive of a balancing shaft is established on cranked to a shaft. The usual adjusting spline is not applied, the effort of an inhaling of bolts of a pulley of a bent shaft provides fixing of an asterisk of a bent shaft. At installation of an asterisk of a bent shaft it is necessary to use the special device for the VMT installation of the first cylinder (fig. 2.8).

Fig. 2.9. Masloprovodny channels of a bent shaft: 1 – the channel for lubricant; 2 – galtel



The oil pipeline for supply of oil is located to radical necks of a bent shaft in cranked to a shaft. Necks and galtel of necks of a bent shaft are strengthened by a nakatka for improvement of load characteristics.

Fig. 2.10. Top and lower inserts and radical bearing: 1 – bolt of fastening of a head of the cylinder; 2 – party of release; 3 – party of an admission; 4 – forward part of the engine; 5 – a corner between two valves; 6 – inlet channel; 7 – inlet channel


The top and lower inserts of radical bearings are made of aluminum alloy. The top insert of the bearing No. 3 - persistent. The top inserts have lubricant flutes and oil channels. Adjusting ledges of the top and lower inserts are absent. Before installation of the top and lower inserts of radical bearings it is necessary to measure them and to establish them so that they settled down on the center of a cover of the bearing (fig. 2.10).

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2.1.1.4. Block of cylinders
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2.1.1.6. Balancing block