Technical What's the purpose of a breather pipe into the air box ?

[UnoMia_SA]

Oil leaking into the air box via the breather pipe ?

Hi,

Just wanted to know the purpose of the breather pipe from engine to the air box ? I took off my air box to take a look at the carburettor and noticed oil in the air box and a bit in the carburettor. Is this normal ?

:idea:

 

[Davren]

It's there so that oil fumes from the engine are directed back into the combustion chambers to be burnt instead of being vented to atmosphere.

Years ago the pipe used to just hang down under the car so that clouds of fumes and oil droplets could spray over the car behind you as your engine became worn.

Dave.

 

[UnoMia_SA]

Hi Davren, thanks for the info.