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Advice on unscrewing a stubborn chainring bolt(4 posts)

Advice on unscrewing a stubborn chainring boltbikeridah
Jan 27, 2004 7:39 AM
Welcoming any suggestions on loosening a truly stubborn Campy chainring bolt (hidden fifth arm if that matters). I tried plumber's penetrating oil with no success. Any ideas?
re: Advice on unscrewing a stubborn chainring boltSalt Peter
Jan 27, 2004 10:24 AM
Park Tools do a tool which locks the inner nut while you turn the bolt; only a few bucks. If you want to make one, it has a central tongue to locate it and 2 outer tongues in line with the 2 slots in the face of the nuts. Good luck.
I stuck a really fat screwdriver back there, and it caughtbill
Jan 28, 2004 1:13 PM
well enough to loosen the bolt. Of course, that was on a brand-new crankset.
re: Advice on unscrewing a stubborn chainring boltIronbutt
Jan 28, 2004 7:04 AM
You might consider something more aggressively penetrating than simple plumber's penetrating oil. I use a product called PB Blaster, and it's really aggressive about getting into and dissolving corrosion. It has never harmed an anodized finish when I have used it like some will.