The noise
noise
Noise !
It is noise .
Noise. Without noise, it can't work. Noise is in an engine, and without it does not work. Every engine has to make some kind of noise, internal or external, inside or outside the engine.
To prevent compressed gas passing into the oil sump of the engine of an automobile.
The noise
gas
Automobile engines are ic (internal combustion).
To pump coolant around the engine to absorb heat, and through the radiator to cool the coolant down again
The oil is in the engine to keep the internal parts lubricated. This is done because without it, the engine would sieze. Metal on metal doesnt typically work well without some kind of lubricant.
In 1769, the steam engine was the first automobile engine capable of human transport. In 1807, the first gas powered engine was an internal combustion engine.
this question should be in 'automobile' section