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SN95 Cobras
Broken crank bolt extraction
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<blockquote data-quote="Blown_By_You" data-source="post: 13644766" data-attributes="member: 35088"><p>Damn dude.. this really really sucks... It's kind of a little late, but it was very important that the first hole that you drilled thru the bolt was CENTERED. If it's not centered, the EZ outs aren't going to work because you'll be trying to unscrew something that is wobbling..</p><p></p><p>I just had to drill two bolts out of my OEM heads. It sucked, and I was able to do it on the bench as well.</p><p></p><p>I would keep drilling.. Do your best to keep off of the threads and make sure to stay in the bolt.. be patient.. very patient.. Any hurry now can really **** you.</p><p></p><p>Take your time.. walk away.. </p><p></p><p>Drill little by little. Having an offset hole to begin with is going to make this more challenging.. If you get the end of the bolt drilled out, you can always drill the crank larger, retap, and use a bigger diameter bolt.. BUT.. since it rotates at up to 6500 rpm, keeping that bolt and hole parallel to the centerline of the crank is going to be critical. I would definitely pull the radiator to give you a better shot at keeping the drill parallel.. Also, I wouldn't be afraid to spend some money, talk to a mechanic/machinist, tow it, whatever.. </p><p></p><p>Because if this gets messed up beyond repair.... well, I think you know.</p></blockquote><p></p>
[QUOTE="Blown_By_You, post: 13644766, member: 35088"] Damn dude.. this really really sucks... It's kind of a little late, but it was very important that the first hole that you drilled thru the bolt was CENTERED. If it's not centered, the EZ outs aren't going to work because you'll be trying to unscrew something that is wobbling.. I just had to drill two bolts out of my OEM heads. It sucked, and I was able to do it on the bench as well. I would keep drilling.. Do your best to keep off of the threads and make sure to stay in the bolt.. be patient.. very patient.. Any hurry now can really **** you. Take your time.. walk away.. Drill little by little. Having an offset hole to begin with is going to make this more challenging.. If you get the end of the bolt drilled out, you can always drill the crank larger, retap, and use a bigger diameter bolt.. BUT.. since it rotates at up to 6500 rpm, keeping that bolt and hole parallel to the centerline of the crank is going to be critical. I would definitely pull the radiator to give you a better shot at keeping the drill parallel.. Also, I wouldn't be afraid to spend some money, talk to a mechanic/machinist, tow it, whatever.. Because if this gets messed up beyond repair.... well, I think you know. [/QUOTE]
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Broken crank bolt extraction
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