For turbocharged cars, the purpose of an oil catch can is very important. The can should work to prevent blow by of oil, which could lead to dangerous situations of coating couplers, causing them to slide off under boost, coating the fins inside an intercooler which drastically decreases its efficiency, and ultimately end up cooking inside your turbo, contributing to a nasty condition of what is called “oil coking” where the oil turns to a charcoal like substance in the turbo over time. In addition, you don’t want any blow by on your pistons either.
To do this, a catch can works by having one line running from the PCV valve (connected to the block) into the inlet on the catch can. From there, it goes into the can, and past a filter. The oil should collect at the bottom. The Boomba catch can is 350ml (pretty good size) to hold more oil and junk. The filter inside is used to prevent any oil from then escaping back out of the catch can through the other outlet and hose that will run back to the intake manifold.
The installation 'looks' simple - and looking back, had I done the install before it's not too bad. The instructions are here. Undoing the bolts for the intake is REALLY simple, 6 bolts - no brainer. Disconnecting the connectors is EASY. The hardest part is getting to the PCV connector behind the intake and cutting the hose to the block.
Mounting the catch can takes a little work since it's a tight spot, but there's plenty of play in the coupling to adjust - be sure to tighten everything well :)
I will be checking the can each oil change and 1/2 way in between changes as well. Will report back on the junk found!