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bolt removal

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MF294-4

08-31-2006 19:31:45

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Have a twisted off bolt in the exhaust flang of a truck manifold. Have heated the manifold red hot and still can't budge it. Is there any other way other than drilling it out? Is it possible that it will never break loose?

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MF294-4

09-01-2006 19:53:25

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Re: bolt removal in reply to MF294-4, 08-31-2006 19:31:45

Heated the flang again and PB'ed the heck out of it. Tried to romove with a stud remover and vice grips, wouldn't budge. Broke down and welded a nut on it. I really didn't want to weld upside down under the truck but did. You couldn't believe how easy it screwed out. Most of the time it doesn't pay to try and take shortcuts.

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Stan in Oly, WA

09-03-2006 08:21:58

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Re: bolt removal in reply to MF294-4, 09-01-2006 19:53:25

Hi,

Most of the time shortcuts don't work but once in a while they do and that's what keeps us from going for the difficult but most likely to work method at the start. In a lifetime of never quite learning that simple truth, I wonder how much net time I've lost to shortcuts.

All the best, Stan

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504-1

08-31-2006 20:17:55

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Re: bolt removal in reply to MF294-4, 08-31-2006 19:31:45

If you can get on it with a pair of Vice-Grips,heat it up and melt candle wax around the threads. let it cool and try the vice-Grips(sometimes it works sometimes it doesn`t) BTW only use Vice-Grip brand the rest just screw things up.

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Bob

08-31-2006 20:15:45

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Re: bolt removal in reply to MF294-4, 08-31-2006 19:31:45

Take a flat washer, and weld it to the broken stud, burning the weld down into the broken stud as nuch as possible.

Allow it to cool to ambient.

Then, weld a nut to the washer, so you have something to grip to turn the broken stud.

When it has cooled a little, hold bee's wax or a candle against it, so some melts, and "wicks" down into the threads.

Allow it to cool to ambient, then try to rock the nut back and forth with a wrench, hopefully breaking the stud loose and unscrewing it.

If the weld breaks off the stud, repeat the procedure. Usually, the stud will break free from the repeated heating and cooling cycles from the welding.

A tip... "Easy Outs" aren't, and the use of one of them will, 98% of the time, lead to having to deal with trying to get it's hardened steel, broken remnant out of the still-stuck broken stud!

AVOID them!

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