Automobile Engineering in ME
The engine oil level should be checked

While the engine is running at high idle speed
A few minutes after the ignition switch is turned off
While the engine is running
Immediately after the ignition switch is turned off

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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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