Quote Originally Posted by 0-TJ-0 View Post
My understanding is that it's technically a "PCV" valve or vent. That being positive crankcase ventilation or something similar to that. It's purpose is to vent the blowby and other gases generated from the crankcase, not specifically the rocker cover.. so I couldn't see any real benifits to fitting another vent on the other side. I also don't see any detriment if you really wanted to.
So what happens on the non vented side?