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 valve mechanism - general information

Fig. 2.20. The valve mechanism of the engine of Mazda 3: 1 - camshaft; 2 - chain valve timing; 3 - an asterisk of a camshaft; 4 - tensioner arm; 5 - chain tensioner; 6 - the crankshaft pulley; 7 - chain guide; 8 - the valve assembly; 9 - cam; 10 - the oil control valve (OCV); 11 - actuator system of variable valve timing

Each cylinder has two inlet and two outlet channel. 16 valve directly driven by two camshafts. On engines of model L3 uses variable valve timing mechanism, which provides the best moment of opening or closing the valve, depending on the traffic conditions are constantly changing phase of inlet channels (Fig. 2.20).

Fig. 2.21. Figure opening and closing valve engine car Mazda 3: 1 - TDC; 2 - variable region; 3 - Issue; 4 - inlet; 5 - BDC

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Camshaft