Re: Re: Re: Re: Re: Re: Re: How do you remove bolt?
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Posted by Jeff King on May 13, 1998 at 20:03:33:
In Reply to: Re: Re: Re: Re: Re: Re: How do you remove bolt? posted by Bonehead on May 13, 1998 at 16:01:21:
: : : : : The biggest danger in this exercise is breaking off the easy-out in the hole trying (1).
: : : : : ::::Bonehead : : : : No drill in the world will drill out a hardened piece of steel like that. : : Easy-Out = Two Lies in One.
: : I have never had one work but I have broken off a couple in the hole. If the bolt is so tight that it sheared off while torquing, it will be so tight that the easyout will break. Don't waste your time with them. Just drill out the hole as others have described, and if you're lucky the thread will be OK. If not, helicoil it. : ::: Lies? Them some pretty strong words partner. But ponder this if you can. A bolt breaks off when over torquing, because the tensile strength of the bolt has been exceeded. Once the head pops off, the stress is removed, if the hole is good and clean, the remainder can be removed with your fingers if you could get a hold of it. Beware of insults, I could call you a idiot, it would true, but it wouldn't be polite. Thats why I wouldn't stoop to that level. But then again?
: :::Bonehead OK, One more technique that hasn't been mentioned. My buddy was working on an in-line 6 engine for a fellow, found a hairline crack from the front corner head bolt to the water pump hole at the front of the block. Thought he'd be a great guy and drill, tap, and put an allen head bolt across the crack. Broke the # 10x32tpi tap off in the hole.
We turned the block over on its side and set up and electrostatic discharge unit on a small arbor press. Use a tungsten welding tip for the electrode and then cover the broken tap, bolt, easyout or what ever with solvent. Set up the transformer (coil) then you just move the electrode down until it starts sparking and eating away at the metal needing to be removed.
Works slick if you can get the item verticle. We had the tap zapped out of there within an hour.
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