truck is a 2003 6.0:driving down the road and truck started to have a bad fuel knock and running rough. died and I tried to read the codes on tach but couldn't remember how and turned the key on and off four times and then tried to start motor didn't crank and was locked up. in fear of bending a rod didn't try to start again. removed glow plugs and bumped starter over to crear fuel from cylinder. remover valve cover to replace injector number seven and found injector hold down bolt broken. how can I remove the hold down and injector with out using the bolt. trucks about due for studs thinking of pulling heads off and fixing it that way but would like to get it going before it snows to much again thanks.