Originally Posted by
terrymorse
The
2012 AR4 had a threaded aluminum BB shell, and an FSA MegaExo bottom bracket.
So if the non-drive side of the BB is turning when you are turning the drive side, the threaded shell itself must be turning inside the frame. That's not good.
Maybe if you hold one side while turning the other side, you can get one of the sides to unthread from the shell. Assuming you get the BB removed, you still have the problem of the loose threaded shell.
+1
That was my fear as well. If the BB shell bonded to the carbon frame is turning, It will soon become more loose the more you turn it. If you manage to get one cup out the other will still be securely fastened to the alloy shell. If you do that your only option may be to pull the alloy sleeve out hoping to reapply adhesive inside the bottom bracket shell. To me, this is probably a manufacturing defect