[Mistero]

Many thanks Swiss. I'm going to refill as much lubricant / coolant into the turbo pipes as I can, as I refit it, (rather than wait until the end).

I heard from the turbo service agent today - not good news; seals have gone, end float which has lead to the blades hitting the casing, worn shaft, juddery operation from the actuator and exhaust impeller damage from 'an object'. Judging by other threads on this subject I'm guessing the 'object' may be part of a piston ring.

Again, thanks for guidance provided.