There's a nice write up by Brad Roberts a few years ago.
Air/Oil Seperator write up?
http://986forum.com/forums/general-discussions/18090-air-oil-seperator-write-up-4.html
See if you have a new hose with the new AOS (See Attached pic). If you do have a new hose just cut the old hose instead of trying to loosen the clamp. This will save you a lot of time and having to buy a special tool. When reinstalling I used a standard clamp and used a socket to tighten.
