Had this for quite some time (since easter), but nobody could find out how or why, now the culprit has been located or should i say spotted, deep down in the darkest depths of the back of the engine (Y30DT). Have been told its a 6 hour job to replace the gasket, as everything including the turbo has to be removed to get to it. So has anybody got a schematic of the turbo/exhaust pipe work so i can work out what gaskets i need to get hold for the job to be done.