The same thing happend to me a couple of months ago.... I replaced the pcv valve,rubber grommet, cleaned intake , replaced valve cover gaskets and it was ok for about 2months.... Just today i found the pcv valve and grommet out of popped out of place and leaking oil down the bell housing of the trans and back of the cyl. Heads. I reinstalled the pcv and grommet but not before wrapping rubber bandover the grommet to make a tighter fit in intake. Now the grommet and pcv do not pop out. However, after driving 2 miles found smoke coming from engine compt. And under car. I opened the hood to find oil blowing past my valve cover gaskets again. Wtf? I'm going to replaced the gaskets again tomorrow this time using felpro rubber gaskets instead of cork and hopefully it will be ok. But i fear that i may have bad piston rings and getting engine blow by.