OMFG i cant believe im reading this. I just went thru the EXACT same sh it this week. I blew my water pump last friday and I finaly just fixed it about an hour ago. And guess what held me up for the last 6 days??? yes thats right the FARKIN same bolt. I own a 600ft lb impact gun and it didnt phase the bolt. I tried everything. 5 foot breaker bars didnt budge it, my all mighty impact gun didnt. I ended up buying a plasma cutter and the did the job. i wish you the best of luck, i was ready to put a 200 shot of nos on my car and just blow the engine