


If you’re unfamiliar with the part, you think: “What is that and what does it do?” You may even question why your plane doesn’t have one and begin wondering if you should have one installed.Īn air-oil separator is meant to do just what the name suggests - separate the oil and air ideally, returning the oil to the engine sump and the air to the atmosphere.

Sometimes you’ll be kicking tires - either on the Internet or on a ramp somewhere - and you’ll see or hear that an airplane has an “air-oil separator” listed as one of its specs. Why You Probably Don’t Need an Air-Oil Separator Why you should install an air-oil separator: Scroll to second article below.Įnter the conversation: Join the discussion in the forum. Why you should not install an air-oil separator: Read the first article below. The large hose at the top is the breather, the small hose at the bottom is the oil return line to the crankcase and the SCAT tubing is where the excess pressure from the case and water vapor exit. This black can is an Air Oil Separator, as you can see there isn’t much to it.
