Automobile Engineering in ME
The aluminium alloy is used in cylinder blocks because

The piston is also made of aluminium alloy
It is lighter and has good heat dissipation characteristics
It does not require any cylinder liners
Material cost is low

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Automobile Engineering in ME
It is necessary to maintain the valve clearances as they

Make the crankshaft turn smoothly
Increase the speed at which the valves move up and down
Reduce the resistance to sliding that occurs between the cam and the tappet
Allow for lengthening of the valves owing to the heat of combustion

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Automobile Engineering in ME
The correct flow of power through the drive train is

Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels

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