Had this problem several times on a non-LBC vehicle. If you can access it try
the method of using a drift as earlier suggested. What can happen with that
method is that the bolt material may be too soft to take much banging or the
bolt may just be in too tight to respond. Try heat if that happens.
Another method that I used, was the EZ Out (AKA screw extractor) method.
Drill a small hole in the center of the broken bolt. Then use an extractor
that's
a bit bigger than the drill. Screw it into the hole. The EZ is reverse
threaded; so, as you screw it in it will be applying reverse threading on the
bolt --
unscrewing it (God willing). A lot depends on the hardness of the bolt, and
the torque of application. If it's a grade 8 you will have to step up your
drill bit.
Good luck,
Ken
'63 TR4 since '63
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