21-03-2018, 08:21 PM
(17-03-2018, 08:54 AM)Chris KC Wrote: ....Ideally size the head so that it locks against the front of the cylinder block and can't come loose.
Absolutely not!! That means you can't tighten it or refit it if there's an oil leak up the thread without removing the cylinder block. It might be how Austin designed it to be with the square headed peg bolt (AKA The 'Teutonic Bolt') but to replicate that idea is not a good move. Tap through into the camshaft bush and make your new peg bolt such that it fits down into the bush without touching the camshaft. Socket head or hex head are both fine. A turn of PTFE tape around the thread, a suitably sized Dowty Washer (or fibre washer and goo if you must) under the head and tighten down. In the unlikely event that you get an oil leak, at least you can refit and/or tighten insitu.
Steve