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

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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

printable version

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.

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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Piston rings and piston pin

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The valve mechanism - general information