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

Valve, valve springs, valve stem seal, Valve Guides

Fig. 2.27. The components of the valve 1 - cracker valve; 2 - the top plate of the valve spring; 3 - valve spring; 4 - valve stem kopachok; 5 - the directing plug of the valve; 6 - Valve

The valves are made of heat-resistant steel. Each cylinder has two intake and two exhaust valves. The inlet and outlet valves are nitrated surface to increase abrasion resistance. Valve springs - variable outer diameter. spring characteristics are improved by reducing the size of the upper seat. Valve Guides made of alloyed alloy to increase abrasion resistance. The valve seat is integrated with the lower valve seat springs, to simplify assembly and improve the maintainability (Fig. 2.27).

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Tappet