anyone ever replace the PCV valve?

[wawa]

Yep I've blown a second AOS this week in less then 2500 miles. Some have suggest the PCV valve might not work and increasing pressure handle by the AOS, thu breaking it again.
Solution would be to change the PCV valve at the same time as AOS, but it look like a hell of a job to reach it.
Anyone ever change it? any tip on how to do it?

thanks
Chris