So the Amazon PCV valve showed up today (valve cover should be not too far behind.) The nipple on the top is indeed a vent only to the diaphragm and not to the crankcase so the guy in the You tube video needing to cover the big port with his hand either has a ruptured diaphragm or there has been some kind of change made! I gotta say the quality "looks" perfectly fine actually better than what the listing picture shows
