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LT7A · 07-13-2018, 11:01 AM

Ken, I have a broken off water pump bolt with the hardened tip of an extractor buried in it as well. What I found works on the hardened tip is a grinding stone on the end of a Dremel. "Works" may be the wrong word since as you can imagine it is a very slow process. And once you have the hardened material out of the way then you're still left with getting the rest of the bolt out. I may rent a magnetic drill so that I have something stable to try to drill out the center of the shaft. Then with a bunch of heat and penetrating oil I hope to get the remainder of the bolt out.

07-13-2018, 11:01 AM	#559
LT7A Registered User Join Date: Oct 2015 Location: PNW Posts: 3,528	Re: "Elwood" the 77_remix Ken, I have a broken off water pump bolt with the hardened tip of an extractor buried in it as well. What I found works on the hardened tip is a grinding stone on the end of a Dremel. "Works" may be the wrong word since as you can imagine it is a very slow process. And once you have the hardened material out of the way then you're still left with getting the rest of the bolt out. I may rent a magnetic drill so that I have something stable to try to drill out the center of the shaft. Then with a bunch of heat and penetrating oil I hope to get the remainder of the bolt out.