Tested the pcv yesterday and tried to blow through it, some air did come through but not sure if it was enough or normal amount but I've order a brand new one seen as though it's probably still the original one on 108,000 miles.
stripped the plenum down to see if the was much if any oil in or around the manifold. There was a large pool of oil in the bottom of the lower plenum.
before and after clean pics below.
there was also some oil on the inside of the upper plenum and throttle body which was quite thick but cleaned it all off.
the thing that concerned me most was when I looked down the inlet I saw that the back of the valves looked quite wet with oil, I'm not sure weather this is from the pool of oil in the plenum or if it confirms that the guides and or stem seals are leaking :/
ive ordered an oil catch can that I'm going to install to see if the smokeyness gets any better combined with a new pcv, I've seen 2 ways to install a catch can
1. Just pcv side
2. Pcv and n/s rocker cover pipe both into the can then vent to atmosphere.
think I'm going to go for option 2 as there was more oil than I expected in and around throttle body.