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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mazda 3 (2003 release)

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Mazda 3
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Mazda
3
Operation and maintenance of car
Engine
General description new engines models L8, LF, L3
The mechanical part of engines
Cylinder head cover
Cylinder Head
Cylinder head gasket
Cylinder block
The crankshaft and main bearing
Balancing unit
The principle of operation of the balancing unit
Vibration damper crankshaft
Engine Front Cover
Piston
Piston rings and piston pin
The connecting rod and connecting rod bearing
The valve mechanism - general information
Camshaft
Camshaft sprocket
Crankshaft sprocket
Timing chain drive
Chain tensioner timing
Valve, valve springs, valve stem seal, Valve Guides
Tappet
Variable valve timing mechanism
Lubrication system
Cooling system
Fuel system
Exhaust and Emission
Electric motors
The mechanical part of engines
Appendix 1
Annex 2
Appendix 3
Engine Z6 - mechanical part
Lubrication system
Cooling system
Intake system
Fuel system
Exhaust and Emission
Ignition system
Control system
Tables
Transmission
Chassis
Steering Gear
Brakes
Onboard electric
Body
 


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The connecting rod and connecting rod bearing



The connecting rod and connecting rod bearing
Fig. 2.18. The connecting rod and connecting rod bearing 1 - the extension; 2 - rod; 3 - parting surface; 4 - a cover of a rod; 5 - the bearing rod


Rod is made of hardened alloy structured to improve rigidity. Usual mounting dowel rod bearing is not used. When installing the bearing to measure the position of the bearing and place it so that it was located in the center of the connecting rod and the connecting rod bearing cap. Lower head and connecting rod cap are formed in the manufacture of a single piece, and then separated into the connecting rod and cap. For the combination of the connecting rod cap and use the surface configuration of the connector. Connecting rod bolt torque is in the area of plasticity tightening is carried out in two steps. Upper connecting rod bearing liner is made of aluminum alloy (Fig. 2.18).

NOTE
There are three types of the connecting rod bearing inserts depending upon the desired gap.


Contour accessory drive belt
Fig. 2.19. Contour accessory drive belt: 1 - a pulley of power steering pump; 2 - the drive belt; 3 - idler pulley; 4 - a pulley of the generator; 5 - automatic tensioner; 6 - the crankshaft pulley; 7 - a pulley of the compressor of the air conditioning; 8 - the water pump pulley


The system accessory drive uses a single serpentine belt. This reduces the length of the engine and facilitates maintenance circuit. For belt automatic tensioner is used with a coil spring. A pulley tensioner automatically maintains the belt tension (2.19).




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The valve mechanism - general information

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