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Re: Broken Bolt Help!!!!
Posted by BobS (more from BobS) on Mon, 29 Mar 2010 17:04:34
In Reply to: Re: Broken Bolt Help!!!!, AaronG, Mon, 29 Mar 2010 12:07:56
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To take Arons approach a bit further, start by grinding a flat on the center of the broken bolt to help get a center punch started as near the center of the bolt as possible. Then start with a small center punch followed by as large a center punch you can get to the bolt with. The punching impacts help loosen the bolt. Drill per Arons suggestions and contrary to some, if the hole is well centered, drill out the bolt to half to 2/3 the bolt diameter to weaken the bolt. The heat from all this drilling will also help loosen the remnants of the bolt. Grinding down the pointy end of the easy out will reduce the chance of it bottoming out in the hole and a may allow a better grip. Using a drill guide works well also, especially on broken exhaust manifold studs.
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