Oh this again
Has anybody done anything special with the engine breather tube to keep it out of the slipstream and spraying oil on the belly? Thanks, Tom
This is one of those never ending debates, heated opinion topics. My input/solution, follow the plans. Standard metal fitting at the engine engine, flex hose, route down to exhaust, terminate vent hose with short metal tube end (w/ diagonal cut facing fwd), located directly over the exhaust hot pipe. Also a small slit somewhere along the rubber hose, known as a whistle slot, is a good idea in case the breather end is blocked. The engine as a way to vent out the slot verses blowing the fwd seals. Oil, water, mist, gunk burns off on the pipe.
The idea is to provide a neutral pressure at the breather exit. A healthy Lyc will not send much oil out the breather. Most of it is water and exhaust by products (sulfur, acid). If you have suction at the breather end, it tends to suck excess oil out, more than needed or desired. If you follow the plans it will work, be light and simple.
PS:
Use the search function in the tool bar and check: breather, air/oil separator or similar key words. There are lots of opinions and info. The consensus from on fancy air/oil separators (in my opinion) is they're not worth it. Plus the gunk coming out an A/O-Sep is nasty. You want to vent it, not route it back in to the engine.
