So, back from the garage and was told that there is excessive carbon build up on the turbo oil feed pipe which means that some how exhaust is leaking from the turbo (shaft?) outside, rather than through the exhaust system. The mechanic is adamant that this means that the exhaust system is clogged and needs to be cleaned/replace parts of it.
Does this make sense? DO I need to worry about carbon build up also inside the turbo ?
thanks a lot