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My Fortitude frames don't have a drain/breather hole in the BB.
I realised this one winter when I wheeled one of them out of the garage on its back wheel and water poured out of the chain stays by the dropouts!
I need to rectify this.
Perhaps I am over thinking this but do I just need to punch the area (with a punch?) and then go in with a 4mm and open it up to 5mm?
Seems almost too straight forward........
Thoughts?
Drill away! Did my old Orange Five in a very similar manner
Just use a sharp 5mm drill and go very slowly so as not to overheat it. You should see a steady curl of swarf coming out of the hole if you're doing it right.
I think I went 3 or 4mm on mine. I suppose bigger is better though. Anyway - well worth it so get drilling.
Thanks folks.
Could I be lazy and leave the BB in?
Yup
I'd take the BB out first, perhaps a little touch of paint on the newly drilled bit to stop it rusting immediately.
I'd leave the BB in, no chance of getting swarf into the BB threads if they're occupied by the BB!
I'd take it out to give it all a good clean up, get any swarf out and regrease the threads. We're not talking hours of hard labour here - just a few extra minutes.
just drill it.