Idler pulley just broke off, the half of the bolt is stuck in the engine and there's no room for a drill. 01 eldorado with 113,000 maintained very well, my first and only car that I would like to keep for life but I would prefer not to remove the engine now. I was thinking of finding someone to weld a smaller head on the end of the bolt. Any advice, and can someone tell me how to drop the engine please.