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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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Valve, valve springs, valve stem seal, Valve Guides



The components of the valve
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

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