Another tale of woe from my bother. He's having a go at sorting his Stag, and the main job is a new clutch. Engine and box out ok. But on removing the old clutch he found one set screw missing, and the rest not matching, some being bolts. :-( Investigation showed that some had been tapped (badly) to accept oversize set scews. Also, the dowels weren't in the flywheel, but welded to the cover. And only two instead of three. The holes for the cover fixing set screws are also blind, which makes sorting them a little more tricky.
It's a long time since I did any clutch, but I remember the cover fixings going all the way through the flywheel - not into a blind hole.
Is it a strength thing?
Looking at the Rimmers site, it's not clear if the dowels are part of the clutch or as usual, the flywheel. The replacement clutch just has holes.
They show dowels for the flywheel to crank, but not flywheel to clutch.
What would be the best way to sort these threads? I've helicoiled ally, but not sure about into a blind steel hole. And since some have already been tapped oversize, this may not be an option anyway?
Worst case cost wise would be a re-con flywheel from Rimmers at about 130 quid with the surcharge for no exchange.
I do have a 5/16th Helicoil kit which I could post to my brother - he's in the NE of Scotland.