Originally Posted by
bellweatherman
Anyone know how to remove a seized bolt? I have a bolt directly threaded under the bottom bracket shell that is holding the plastic bottom bracket cable guide. I've tried everything. Water, WD40, but I cannot remove it. It is really stuck in there. Any ideas?
First question: have you broken away the cable guide so that you can just grab the screw with pliers? Are you trying to salvage the cable guide? They are less than $1- each if you purchase dozen; $5- or so each at the LBS. Chemicals (as listed in the posts above) that are effective on helping getting the screw out will damage the cable guide.
An impact driver will dent the BB shell; which will be difficult to repair.
Using a drill to remove the head of the screw, which will then allow removal of the cable guide, followed by pliers on the remains of the screw will be effective. New screw required.