best breather pipe location

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hillbone

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hello again.
whats the best practice for locating an oil breather hose on my mk3. i seem to always end up with a heap of oily sludge in time all over the centre stand etc. has anyone used a catch can or something clever to catch the mist?
does anyone feed it up along the rear guard to keep it away from the frame?
cheers hillbone
 
I do not think a simple "can", with an IN and OUT is going to catch very much oil mist....the majority of the mist will simply travel with the air flow.

The can must include some sort of scrubber material such as steel or copper wool, open cell foam (oil proof), or fine mesh screen which coalesces the oil droplets and ultimately allows the oil to drip to the can bottom where it must be periodically drained. Optimally, the can should be located so the oil drains back to the engine, but a one way valve (reed valve) will prevent this.

IMO, the most optimal solution is to vent the engine to the oil tank, then vent the tank via a scrubber can that is above normal oil level and configure the can to drain back to the tank.

I have considered routing the vent tube to the rear mud guard, but had concerns that eddy and swirl airflow back there would only transfer the oil mess from one place to another. Note: these were only concerns....it may be this is an OK solution (but not a happy environmental one).

Slick
 
I simply run mine just like it came, to the oil tank. Then, since I no longer use the original airbox and the trap that vented vapor to carbs and the box itself, I just run the tank vent to the ground. I get no oil slick or mist of any kind. In cool weather after a ride I may get a US penny size drop of oil/vapor (see the mayonnaise thread :lol: ) under the vent pipe in the morning.
 
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