I stripped my 2003 280txt Pro engine 3 years ago. I just got back to re-assembling it! Is the thread on the flywheel bolt, a left hand thread? I have a black M10 1.5 bolt and have cleaned up the thread (right hand) on it, but I can't get it started. Before I butcher into the flywheel shaft, I thought I would check if it's left hand thread!
Many thanks