Two reasonons: 1. I read somewhere that you should. 2. When pulling that hose on the passenger side when I was dismantling the old engine and removing the intake manifold - there was a little oil in that tube.I thought the PS was the clean side and no need for a catch can there?
So as a precaution, this is what I'm going to do. I will see if that was a wise decision or not. I can always remove it. We will see after my next oil change.