The 2 belts had came off due to the main crankshaft bolt holding on the crankshaft pulley. So i put the new belts back on still not aware that the pulley bolt was still loose. when i cranked it, it made a loud thumping kinda noise. Belts came off again, then i discovered the bolt being loose. So i tighten it, but now it wont crank, like it may not be getting fire. could that bolt being loose make the timing belt break or come off? I wouldn't think so since the bolt shouldn't have any thing to do with the timing belt. What do you think?