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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2.1.1.12. Rod and conrod bearing

Fig. 2.18. Rod and conrod bearing: 1 – expansion; 2 – rod; 3 – surface of the socket; 4 – rod cover; 5 – rod bearing


The rod is made of the structured tempered alloy for rigidity improvement. The usual adjusting spline of the conrod bearing is not used. At installation of the bearing measure position of the bearing and establish it so that it was located on the center of a rod and cover of the conrod bearing. The lower head and a cover of a rod at production are created as a uniform element, and then divided into a rod and a cover. For combination of a rod and a cover use a configuration of a surface of the socket. The conrod bolt has the inhaling moment in a plasticity zone, the inhaling is carried out in two steps. The top insert of the conrod bearing is made of aluminum alloy (fig. 2.18).

NOTE
There are three types of inserts of conrod bearings depending on the required gap.


Fig. 2.19. Contour of a belt of the drive of auxiliary units: 1 – pulley of the pump of the hydraulic booster; 2 – driving belt; 3 – tension pulley; 4 – generator pulley; 5 – automatic natyazhitel; 6 – pulley of a bent shaft; 7 – pulley of the compressor of the air conditioning system; 8 – pulley of the pump of cooling liquid


In system of the drive of auxiliary units one poliklinovy driving belt is used. It reduces length of the engine and facilitates service of a contour. For a tension of a belt the automatic natyazhitel with a cylindrical spring is used. The pulley of a natyazhitel automatically supports a tension of a driving belt (2.19).

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2.1.1.11. Piston rings and piston finger
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2.1.1.13. The valvate mechanism – general information