Red92,

That's a straight forward test. Did you try it? I pulled the hose with my second PCV valve off the driver side cam cover. With the motor idling, put my thumb over the PCV valve at the end of the hose end leading back to the rubber boot. No noticeably vacuum on my thumb. But surprise, you can clearly hear and feel the vacuum sucking air into the driver side cam cover. How do you account for that? Where is this air going if not back out the passerger side cam cover? See step #2.

I have a test for you, fair enough? Since you already have your seperator between the PCV valve and lower intake galley and the upper plenum is blocked off, install my second PCV valve on the driver side cam cover. Then see if you get any more oil in the seperator!!!

Please let us know the results. Maybe in a new thread and we can put to rest any guessing as to what works and whats sale pitch BS.

NoSurprise