blow into the valve cover breather hose, out the dipstick tube???

[AlphaAssault]

i was trying to make sure the valve cover intake system and pcv valve wernt clogged or anything. i take everything apart, clean the valve, and put everything back in. everything seems to be working fine. i got curious and wanted to see what would happen if i blew INTO the crank case breather tube. i disconnected it from the intake, and blew into it. to my surprise, i heard a vague hissing coming from somewhere. i blew into it again, and it sounded like it was coming from the dipstick tube WTF i take the dipstick out and breath into the crank case hose one more time, and i can feel the air coming out of the dipstick tube with my hand. is it supposed to do that? what does that mean?

 

[MichaelSuch]

When I did a boost leak test that happened to me, what I did was turn the crank pulley and it stopped. I believe it does that because the intake valves are still open.