Join Date: Apr 2005
Location: Northfield, MN
Bikes: 1997, stumpjumper S-works hardtail, Medici, Giant allegre (track dropouts and fixed gear), Columbia twosome, schwinn twinn, '67 raleigh 5 speed internal hub, Old triumph 3 speed, old BSA 3-speed, schwinn Racer 2spd kickback, Broken raysport criteriu
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You didn't mention if it was an older square spindle, or a newer splined version (octalink?). I have overtightened a few crank bolts in my time, or perhaps they were like that when I bought them (hazard of buying used bikes). so if you're dealing with square spindle you may have actually streteched or cracked the aluminum crank around the spindle hole. If it's the newer splined type of bb/crankarm, then I don't know, I don't think you can overtighten those, as they have a definite "hit bottom" feel when you crank them down.
If it's the square type, you may have also just had it loosen once, and then the slight wobble of the crank on the spindle has altered the shape of the crank's spindle hole. IF that's the case, I'd try wiping it reallllly clean, (absolutely no grease, and then applying loctite to the spindle, and then also make sure there's no grease or oil in the threads of the bolt, or axel threads, and loctite there too. I've had fair success with this method, as I ovalized one of my cranks spindle holes, trying to get home after it loosened.
If it's cracked from overtightening, it's just time to get a new one.
You might also try JB welding it onto the bb spindle. Just make sure you NEVer want to get it off, and can get the BB out of the side with the JB welded crank arm, or you'll have to hack saw the spindle through that side.