UK Auto Repair Questions?
Hi my name is Gavin what is the make and model as it does not say.
How many miles have you done after the turbo was replaced.
Did the smoke reduce as you was driving.
How did the turbo fail and did the engine start running on its own oil when it failed.
Right so the problem was there before was the engine burning a lot of oil.
The garage was correct for thinking it was the turbo the smoke is grey in colour ???
It will have to have the engine stripped check cylinder head / remove pistons and check for a cracked piston ring.
It would not overheat with them issues it would just smoke.
Some workshops do not like stripping engines is it at a main dealer ?
The compression would not be down that much as it is rare for a ring to fail it does still happen.
Just a thought before it started did you go through any deep water.
I would get the valve stems in the head checked then move on from that point.