not needed, also replace gromat (rubber peice which hold PCV on Valve cover).
Turn engine on, disconnect hose from pcv, you will hear lots of vacuum, spay TB cleaneer in vacuum
that will clean hose all the way to intake.
if nobody replace for longtime chances of Gromat break a part and falls inside, there is grill between valve and valve cover, nothing to worry.
Every 15,000 i do replace gromat and PCV. and my all cars oil caps looks brand new.