Okay probably a dumb question but here goes.
A ball milled PCV Valve and breather set arrived in the mail today - woohoo.
https://www.ebay.ca/itm/Billet-Alumi...72.m2749.l2649

However, in my mind, the PCV Valve works backwards. My assumption is that the part with the valve connects to manifold vacuum. Then in high vacuum situations the crackcase fumes are sucked out of the valve and into the intake. So the valve should work one way, from engine side and out the small tube. However, it only works if I blow into the small tube (flow into the engine, not out)... What am I missing?
Thanks guys
Steve