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BB creak...Ti Shell/Shimano BB(5 posts)

BB creak...Ti Shell/Shimano BBMrCelloBoy
Jun 11, 2001 2:14 PM
My sweetie has a Merlin with an XT sealed bottom bracket. Almost since deivery it's had an annoying creak under pedal load. It seems worse when it's cold. The builder disassembled and re-assembled it several times, adding teflon tape, but the creak persists. Any feedback on similar problem/solution from any of you?
try...Hank
Jun 11, 2001 2:23 PM
try putting Permatex non-drying gasket sealant where the non-drive cup comes into contact the bb body (I got this direct from Shimano several years ago when I was working in shop - it's always worked for me). Then use anti-seize on the bb threads and in the bb shell. And of course, the creak could be coming from other places, too...pedals, cranks, etc.
re: BB creak...Ti Shell/Shimano BBCliff Oates
Jun 11, 2001 8:55 PM
You also may want to relube the seat clamp and the saddle rails. My creaks all seem to come from that location. If that doesn't work, you might also want to disassemble your cranks and rings, then put a little fresh lube on the chainring bolts before you reassemble things. If nothing else, at least that gives you the opportunity to clean up your chainrings with degreaser.

I'm hoping that tonight I fixed the very metallic clunking noise coming from my drivetrain by re-installing my bottom bracket with a little teflon tape...
Checklist for BB area creak under loadAlexR
Jun 12, 2001 10:41 AM
1) Chainring bolts, are they tight, are they threaded properly, are they greased. Keep in mind you need a unique tool to brace the nuts that thread those bolts.

2) Crankbolts, same as above

3) Pedals/cleats. Cleats creak like mad sometimes, but if your sweetie is a perceptive girl, she should have been able to figure out if it was the cleats.

4) Bottom bracket - you've checked and double checked

5) Frame - uh oh. Cracks in the BB shell creak. I'm actually hoping the BB shell on my frame breaks. My frames got lots of paint chips and dings and is under warranty. A new one would be nice.

Hope you find it. My guess is the chainring bolts.

ALex
re: BB creak...Ti Shell/Shimano BBveloboy
Jun 12, 2001 12:10 PM
I agree with Hank. My last two road frames, both Ibis steel with dura ace bottom brackets had the same problem. I went through the whole teflon tape, pulling everything from the seat to the pedals apart, trying to fix it to no avail.

I finally got turned on to using Anti-sieze on all the threads (bottom bracket, crank and chainring bolts and pedals and not a peep. I'm 195lbs and a pretty aggressive rider. The stuff is a little messy but it works.

You should be able to find it at auto parts stores or racing shops. I got it from a family member who restores old cars. I looked at home depot and they didn't carry it.

Good luck