you,re probably gonna have excess crankcase pressure till those rings bed in steve, i would run some thicker oil in it for a few weeks first, before you start stripping stuff
theoretically you could buy/borrow oil pressure gauge, maybe it would help confirming Baz's suspicion..
btw, sorry for thread "hijacking", but does anybody know, what should be the k10 1.0liter oil pressure when cold idle, warm idle, cold cruising and warm cruising? I saw it somewhere, but now cant find it anymore.. (mine is about 40psi, 20psi, 80-90psi, 45-55 psi)
One other thing now, i have took off the turbo and looked on the exhaust side and there walls of the turbo are grey as aposed to black how it was before, also the spark plugs are grey?