Air Breather
oil
return
Crankcase
breather
Oil leaks/Consumption
OIL/AIR BREATHER LINES BLOCKED
Under normal circumstances, a mixture of air and oil is pushed through the crankcase breather line into the oil/air
separator as part of the normal venting of the crankcase. The oil flows back into the oil sump trough the oil return line.
Avoid ‘loops’, blockage or misrouting of either of these lines, as this can cause oil to leak.
Air leaves the separator through the air breather line. For safety reasons, we advise to install an air breather vent line
yourself. Make sure this line cannot touch the muffler or can get blocked for some reason and is installed in such a way
that there is no ‘suction’ or pressure on the line. If the air cannot escape it may lead to high pressure in the engine.
Likewise, if there is suction on the line (routed to a low-pressure zone without appropriate ‘line nick’) crankcase pressure
may drop. In either case you may experience oil leaks as a result of these conditions.
Nick cut into line to
prevent pressure
changes running to
air/oil seperator
