Hi Tony,
I'll be interested in seeing pictures of the bore, when you wind it over or remove the piston.
Have a read though Shonkys 300 Tdi rebuild thread. He found a few inconsistencies in the manuals, as well as a few traps for the inexperienced.
Rebuilding my 300Tdi
Mike at Britannia Restorations on Youtube has lots of good 300 Tdi stuff.
As well as the wealth of knowledge here.
With your new R380, a proper manual transmission fluid is better then ATF, I use Castrol Syntrans and the shifting is much better than ATF.
Tony

