I'll post pictures when I'm done.
OK, here's some additional information about the oil separator:
A thread with a picture how oil separator works:
and another one:
The oil separators are different for pre- and post- facelift models:
Here's a picture of pre-facelift:
And here's the post- facelift:
MD molded oil separator into a huge "resonator" and thus it increased its price so it's worthwhile to clean and save yourself $$$'s
It's part 90 on this picture:
The oil gunk accumulates on the sides inside the rubber tubes and oil separator over time. It's a natural process so it needs cleaning/check up every other mileage. I'd say 40,000-50,000.
The problem comes when air nozzles, and PCV valve get blocked. The oil then starts getting into the MAF and problems arise...
Here's the thread on how to clean the nozzles:
As far as I read replacing a PCV valve should be a regular procedure done every 40,000-50,000 miles. The issue here is that it's located in a hardly accessible area under the inlet manifolds and replacing it is a PITA.
So my idea is to install the oil catch can/tank right in front of the PCV to protect it from contamination.
After some more extensive research I've found a very simply DIY oil catch can MOD. I liked it because it's very small and I can install it right in front of the PCV valve rather than installing big oil catch can and routing tubes to it. And it will be above the PCV, and I don't want it (afraid of oil will reside in the tube and make things worse...).
Here are some pictures of this oil catch can from different forums. Can be easily picked up at local Home Depot store. It's a Husky one.