Join Date: Jul 2002
Location: Saturn (or SE Michigan)
Are you using a ratchet, or a drill? Is it the threads that are getting stripped or is it the torx 'socket' in the head of the bolt?
If the wrong sized torx bit is used, stripping can happen in the head of the bolt, and you may end up having to use a screw extractor, such as the ones in the kit made by Craftsman for $20 (it's a kit of specialized bits that will back out screws and bolts, but uses a drill).
Try using a drill, set to reverse, with the correct size torx bit (it looks like a T-30, though I didn't measure it), and see what happens. I haven't loosened any hood hinge bolts, but it's come in handy on other things of a similar nature.