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Why in the world did you pull all the studs out???? A little harder to get the head off when studs are used but better torque and no danger of the bolt holes in the block being worn out ever. There is one thing you can do that would get the stud out most likely but you must be an accomplished welder. Place a steel nut a size larger than the broken stud or bolt. In this case that would be a 1/2" steel nut. Place the nut over the stud and weld inside the nut to the stud. A wire welder set sort of hot does the best job. The only trouble with this is that if the nut shears off you are going to have a really hard broken off stud then that will have to have a carbide drill bit to cut it out. When I worked at the Anniston Army Depot on the M1 A1 Abrams battles tanks we had to remove gun turrets from the larger turrets and they were held in with quarter inch bolts every inch around about a thirty inch diameter opening and try as we may there would always be some of them that would break off in the turrets castings. Now you can't throw away a turrett that cost 100 thousand dollars because a bolt is broken off in it. Those welders in the turrett shop thought nothing off removing a hundred a day from the turrets. The way they did it you would have never believe would work. They took a small diameter steel welding rod that was about the same metalergy as a coat hanger and with acetylene and oxygen they would braze a ball onto the top of the little broken bolt or stud and while it was still red hot they would take a small pair of vice grips with good grippers still on the jaws and clamp onto the red hot ball of steel that was brazed onto the broken bolt or stud and nearly every time out it would come the first try. They might have to do it twice on one in 50. This is what you call art! Zane
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