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Oops...need help!(6 posts)

Oops...need help!scary slow
Feb 25, 2003 12:04 PM
Just got my frame back from the powder coater (posted pic last week). I was working on building the bike up last night and have a severe problem. For some reason the bottom bracket wants to cross thread itself. I have tried 2 bottom brackets with no success. It came out like a dream when I broke the bike down but something is definately wrong now. I have tried every manner of lube and cleaning to the area but nothing is working. Is it possible to get the bottom bracket re-threaded, or am I up the river without a paddle?
take it to your LBSlaffeaux
Feb 25, 2003 12:08 PM
You probably need to have the threads chased (i.e. rethreaded). Also the headset and BB shell might both need to be faced (slight bit of material removed form the surface) if the company that did the powdercoat did not do this.

The whole process will take 20 minutes and cost you $25. Well worth it.
take it to your LBSscary slow
Feb 25, 2003 12:21 PM
Thanks...I just wnated to check before I took it in and looked like a complete moron. The powder coater did a good job of taping off the botton bracket and headset so I don't think they will need to be faced. I am thinking that the heat from the baking process may have distorted the the threads. I am also going to have the shop check the frame alignment as well.
that's a good idealaffeaux
Feb 25, 2003 1:14 PM
Since you've gone to the trouble of getting a new paint job, a few extra bucks to have it checked out completely is worth it.
The issue is the edges.Spoke Wrench
Feb 25, 2003 4:45 PM
If your powder coating isn't perfectly even, your headset might not seat square with the head tube. Appearently, you have a coating build up where your BB threads start which is making it difficult to get your bottom bracket started square with the frame.
Home remedyKerry
Feb 25, 2003 5:35 PM
If your BB has a lock ring, thread the lock ring onto the cup, leaving just a few threads of the cup showing on the end to be threaded into the bike. Press the cup against the frame, using the lock ring to hold it square to the frame. Keeping the lock ring pressed against the frame, thread the cup into the frame. The lock ring will keep the cup going straight.