ORIGINAL: Recycled Flyer
16 evenly spaced marks, 8 evenly spaced head bolts ................. hmmm, uncanny coincidence? Coupled with the fact that the foil was undoubtedly used to get a good seal and what precludes that almost every time? A ham fisted torque setting! I too think that Hobbsy has nailed this one good and proper.
Except that the "features" are just far enough down the bore to coincide with the ring at tdc.
Ray