I've been running a small filter on my valve cover and plugging the hole on the intake for quite some time now. I've finally come to the conclusion that my PCV system is not working properly because of this. (causes oil to be dropped into my intake runners and causes a smoke problem) I know that by adding a catch can to my engine I will sepearate the oil from the crankcase vapor.
Now one of the ??'s I have is that Ive seen several different ways of the catch can lines being run .
I have even seen some extra holes being made to the valve cover, but I cant figure out why ?