Originally Posted by
fietsbob
May be re threaded Italian, unless it already is Italian threaded.
if so it explains right cup coming loose, its not LH threaded..
but heating to molten brass, may loosen the brazing holding the shell on the frame tubes.
you might look for a shiny new frameset, this time torque the bearings down to spec.
Italian may work but I'm thinking Helicoil will be slightly better possibility as it will introduce more not less metal
Brass option will surely mean repaint so I may as well go for the new BB shell option at a guess.
New frame is always a nice thought but I couldn't give up on my old classic without a fight.