Re: Broken bolt extractor in engine block

Posted by wilsonsk on January 18, 2014 at 20:55:41 from (96.2.97.209):

In Reply to: Re: Broken bolt extractor in engine block posted by Red Mercury on January 18, 2014 at 20:38:20:

I do a little gunsmithing, and yup, you can break them with a punch in a blind hole, typically it's when tapping scope mount holes. It is pretty easy.

I'll also say I have given up all hope of easy-outs working as well. My preferred method is drill it with a pretty small bit, then start moving up in size till you get to the tap drill size, then run a tap in it, it has always found the threads if the old bolt didn't come out with the drill. The plan B is to go up to the next size with a fresh hole. I have used left handed bits when I have them, I have done more with right handed bits than left, still works well. The downside is when it happens in a situation where you can't get to it to drill it ice and straight. I pulled a 390 out of a 76 F-250 to extract an exhaust manifold stud. Better then completely screwing it up.

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