Re: Re: Re: How to remove a broken bolt (Please help)
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Posted by DDG on September 29, 1998 at 14:49:56:
In Reply to: Re: Re: How to remove a broken bolt (Please help) posted by E.Allison on September 29, 1998 at 10:51:17:
If it's broke off down in the hole a ways, get a short piece of copper tube that fits the hole, turn up the welder, run the stick down into the tube and weld into the end of the bolt (the weld won't stick to the copper, and you won't melt the aluminum threads, then get on the copper tube and try to take it out with a small pipe wrench: : : I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want to break the easy out off in the bolt.
: : : Can I heat aluminum? Can I try to weld a new bolt head to the bolt? Should I just drill it out completely and use a heli-coil?
: : : Please comment. : : I don't where to get it, but nitric acid will eat the steel bolt and not touch the aluminum. It will also eat flesh, lungs, clothes and the like. : : Otherwise penetrations of penetrating oils such as kerosene, wd-40, liquid wrench, and pierce (the best of the lot that I've had succes with, kerosene and WD-40 seem equally ineffective) are more effective if the stuck parts are violently jarred to open up a crack in the corrosion for their entry. But don't peen over the ends of the bolt to make a rivet! : : Have you considered retapping the hole in the steel, say for a 5/16" bolt and then put a sleeve around the bolt in the other piece? The heat of drilling and tapping may loosen the stuck bolt or just prove its really stuck. : : You can heat aluminum but not violently, it melts before it glows. Aluminum does expand faster than steel so heat is one way to loosen up a stuck bolt. Better with a hot air gun than acetylene or even propane. : Have you actuallt tried the nitric acid? It sounds like it might work. I hate to see steel bolts in aluminum, I've spent hours with similar problems, I guess stainless bolts or anti-seize compond cost too much for the people building this stuff. EEA
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