1.8T BEX 190 I'm having a problem with sludge in the vacuum system. Already cleaned pipes and replaced PRV & crankcase breather valve 2 weeks ago but sludge has come back - this time it seems to be thinner (more watered down) than last time and if I were honest it looks like what you would expect when coolant and oil mix (slightly off colour mayo) . . . . No signs of this in the coolant tank or on oil cap/dipstick though. I do however when idling for a minute and car is up to temp get a thick white smoke from the exhaust. The air box is making a deep farting noise at the moment as well!? Not sure if this is just at idle or when driving as well. Its almost as if the sludge is being sucked round the PCV system to TIP, though turbo and burnt by engine then obviously exiting through the exhaust hence smoke?! Just had full service 4 weeks ago and oil is down to min already so burning more than usual. I can't see this being the head gasket at the moment but I could be wrong! Has anyone got an idea where I should start?