The pipe that goes from the air box only goes straight to the rocker cover which is not blocked at all (fully tested/cleaned)

Now ive been running it up and its also breathing very heavy from the dipstick if you pull dipstick out while its running there is alot of smoke coming from there and still coming from the pipe from rocker cover to airbox

Now ive seen many different things being said but don't know where to start, people saying about a valve that goes tits up which you can bypass/drill out ??

where are all the pipes on a ZetecS engine and where shall I start