After my rear cam plug blew out the first time, I did what I thought was a thorough job of renewing the PCV system - I removed and cleaned the oil separator box as well as the flame trap, replaced the small vacuum hose going from the flame trap to the intake manifold, and plugged the two evaporative emissions vacuum lines coming off the throttle body (old ones both were leaking badly - this is a temp fix to seal the vacuum leak until I figure out the problem). After I did all the work, my rear main seal appeared to start leaking, and then the cam plug blew out again.

Anything I might have overlooked? I think I have high crankcase pressure but I've about run out of ideas.