Join Date: Mar 2005
Bikes: Specialized AWOL, Soma Juice
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There shouldn't be any real regular maintenance with that bottom bracket. It's a cartridge system so if a problem evolves you have to replace the whole thing. However, bottom brackets are a common scapegoat so if you do start having problems actually try to find out what's causing it, and don't just get a new bottom bracket.
Water in the frame is just not good. I would turn it over, with the post out, and try to get all the water out. If it's steel it could rust, if it's aluminum, well I don't know but it's typically not good. If only for added weight.