One of the Bolts that hold on my LT's broke off inside.. didnt know it.. for a while their i thought i blew the gasket then i looked in the back bolt was missing.. cant get new bolt threaded in so i tried sticking a screwdriver through to see if it is clear.. nope it wont go in.. now is their any way something else could be blocking the hole? or what the hell can i do to get the broken bolt out? besides go to a machine shop..