- Soak in penetrating oil (Liquid wrench, Marvel Mystery Oil, diesel fuel, WD40, oil of wintergreen, bore cleaner). Allow time to work. I like to soak the rusted fastiner once weekly for a month or two with diesel fuel.
- Gently hammer the proper sized bolt out from Sears, Irwin, Home Depot and twist counter clockwise.
- If broken off then stud remover (if stub is long enough) or spiral extractor, or multispined extractor after drilling proper sized hole.
- Heating with torch then applying penetrating oil when warm not red hot.
- Burning the nut off with torch.
- Using torch to weld another nut.
- Striking the bolt or nut with hammer and with medium force then more penetrating oil.
- Cutting groove in nut with dremel and then enlarging groove with chisel and then more penetrating oil.
- Cutting off nut with cut off wheel.
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How to Remove a Rusty Nut or Bolt
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- 10+ Years
- Posts: 286
- Joined: Thu Nov 04, 2004 11:50 pm
- eBay ID: falco-de-fiume
- Location: NE, Cheney
How to Remove a Rusty Nut or Bolt
I know this is elementary to most, but a few may need the knowledge and most might learn one more technique. Here are a few suggestions:
Si hoc legere scis,nimium eruditionis habes.
- Brent
- 10+ Years
- Posts: 1055
- Joined: Thu Feb 06, 2003 9:21 am
- Zip Code: 93510
- Location: Acton Ca.
To remove larger bolts 3/8 and up that are deep seated the following works:
- Drill the bolt out with the largest bit you can use that won't damage the bolt hole threads
- Use a saber saw with a narrow metal cutting blade and saw through what is left of the bolt in three or four places. Don't worry if you saw into the threads a little it won't hurt anything.
- Take some bread, not Mama's homemade, but the doughy stuff and put it in the drilled hole. With a small chisel or screw driver loosen one of the bolt pieces and extract with a small set of needle nose pliers. The bread will keep the bolt pieces from falling into the hole and will desolve in water or oil.
- Put a sealer on the new bolt and you're ready to go.
I just removed two hydraulic fittings I busted off. Sounds like it would leak if you saw into the threads but I have never had one do so. Maybe one of our plumbers can tell us why it doesn't.
- Drill the bolt out with the largest bit you can use that won't damage the bolt hole threads
- Use a saber saw with a narrow metal cutting blade and saw through what is left of the bolt in three or four places. Don't worry if you saw into the threads a little it won't hurt anything.
- Take some bread, not Mama's homemade, but the doughy stuff and put it in the drilled hole. With a small chisel or screw driver loosen one of the bolt pieces and extract with a small set of needle nose pliers. The bread will keep the bolt pieces from falling into the hole and will desolve in water or oil.
- Put a sealer on the new bolt and you're ready to go.
I just removed two hydraulic fittings I busted off. Sounds like it would leak if you saw into the threads but I have never had one do so. Maybe one of our plumbers can tell us why it doesn't.
Always try the easiest thing first.
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