>JB Weld will take threads, but they aren't very strong. However, I'd be
>surprised if you can tap a hole that is half in aluminum and half in JB
>Weld. Since the JB Weld is so much softer, the tap will want to hog in on
>that side, at the very least you'll wind up with an oblong, off-center hole.
>At worst, the JB Weld plug will break loose and try to turn.
This has been my experience with trying to do this with epoxies.
I've never tried this in Al, but I've tried in steel and cast iron,
and it doesn't work. You either need to go oversize, or fill and
redrill.
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