Originally Posted by
mconlonx
The bearings are $20 and can be worn to the point where they need replacing in as little as 3-5k or so. I don't know why it wasn't suggested you replace them at the same time you did the new crank; if you did the replacement on your own, replace the bb bearings. Even if you like to work on your own bike and are competent doing your own work, this is a great time to have a shop do the install -- they should have the correct install tools, and they may be able to suggest something else where the noise is concerned.
Other than that, I would also check the screws holding your cleats to your shoes, the seatpost/-mast clamp (to indicated torque setting), and the saddle rail clamp (to indicated torque setting).
I have a hard time believing it could be anything to do with the frame itself, and replacing the BB even on your own shouldn't void the warranty.
Excellent reply, I will do it. For sure I will have a shop do it, from what I read, you need to install the press fit BB with a special tool. I don't even know how to pull them out! Like you say, they are $20, even if it's not that, it's probably good to replace. Had it been a traditional BB, I would have replaced it anyway with the new groupset.