well
its funny u mention that?
Ive just recently had the car off the road, cos the cam went i used the old one, but the rest of the engine was fully re-built 3.5k ago.
i re-built the turbo aswell while it was off road, when i got it running again it was pissing out with smoke.
Bit pissed off, had a look and found a valve guide pushed down and that port on the head was soaked in oil.
So i had the head off and had a new guide fitted.
Now its all back together it smokes for a few seconds as soon as its started then thats it never smokes again.
The bores still have the slight lines in them from the re-bore.
The compressions it produces are excellent though, about 180 per cylinder???
A lot of people have been saying about the oil returns on these engines not being up to the job for the cold oil as it doesnt drain away quick enough?