What normally happens is,
If you have a boost leak of any description you have a loss of pressure on the turbo oil seals allowing oil to seep past
This is then blown though the inlet side of the engine.
Don't worry to much as a little will do no harm, just makes a mess as the years & miles roll by
Take mine for example, I had a leaking intercooler on the bottom where it's plastic end cap is crimped on (most do this)
This was allowing oil past the turbo oil seals due to lack of pressure & was being blown though the inlet side & out the
Leaking intercooler making a right mess.
I drove the car for 35k miles like this before replacing it when I did my overhaul of the engine & it was leaking
when I bought it
.
You can test you P.C.V valve is clear by taking the rubber pipe of the cam cover that connects to the inlet
(after the butterfly flap).
Just pull it off, push on a suitable pipe that's at least 300mm long & 25mm i.d
Then suck & blow though it.
As long as you can suck though it it's fine
Or just start it up having removed the small pipe, rev it whilst you have your hand over the stub on the cam cover,
You should feel air being pushed out as you raise the revs.
The only problem with doing this is it'll run crap with the pipe disconnected due to the un-monitored air going in
& it might flag up a engine management light.
Don't worry once put back correctly after three or four starts it'll go out on it's own.
