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#1 |
Account Suspended
Join Date: Nov 2001
Location: Oregon
Posts: 147
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cross threaded bolt
I'll be darned
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#2 |
Registered User
Join Date: Feb 2004
Location: Massachusetts
Posts: 269
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It depends. The threads are damaged now. if you re-tap it you can clear the way to proerly thread the bolt in, but the threads are still damaged and weaker than original. If this bolt neads to be torqued the threads could strip out, and probably should be helicoiled. If it's a shear loaded bolt that doesn't need to be torqued, then you may be OK without the coil.
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72 Cheyenne Super 4x4 SWB |
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#3 |
Registered User
Join Date: Dec 2002
Location: Tampa
Posts: 1,191
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Sonce it's a grade 8 bolt I'll assume that it's use is more for clamping (as opposed to say a grade 5 for shear strength). I would run a thread saver in it and then torque the bolt. If the threads pull then heli coil it. If it holds the torque it will be fine. A thread saver is not the same thing as a tap by the way. There are meant for cleaning and restoring threads not cutting them like a tap. Similar to a thread file but for holes.
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'68 Short Step LS1/T56, Hydratech, Fatman Fabrications Stage III, Baer, Hot Rods to Hell, US Body, S&W, etc |
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#4 |
Stepsides Are Bedder
Join Date: Feb 2004
Location: Norco, CA
Posts: 238
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I learned a long time ago to always start a bolt with my fingers...if it binds, find out why and fix it, don't just grab the impact.
Where is the bolt located, and what is the type of metal that is damaged? There's a thread repair item called a kee -something that is a hardened insert with internal and external threads. You thread it like a helicoil, screw the insert in, then there are 4 little keys on the OD of the insert that you drive in with a hammer to keep it from turning. I'm sure there are others, but a lot of it depends on what you are trying to fix and the type of material that needs repair. |
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#5 |
Registered User
Join Date: Feb 2004
Location: Massachusetts
Posts: 269
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I think that's a Keen-sert your refferring to
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72 Cheyenne Super 4x4 SWB |
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#6 |
Account Suspended
Join Date: Nov 2001
Location: Oregon
Posts: 147
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Thanks for the help guys; I'll work on getting it fixed this weekend. The bolt attaches the backing plate to the flange on the end of the axle tube. 3 of the 4 bolts are fine. I did thread it by hand to start but must not have been far enough because when I put the air wrench on it the impact must have caused it to fall out and by then it was too late...
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#7 |
The oddest Todd around
Join Date: May 2004
Location: Miami, Florida
Posts: 1,418
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Maybe it's just me, but can't you replace the bolt. I bought a sh**load of different sized grade 8 bolts and whenever I'm working on something I just replace the bolts and nuts with new ones. Lowes has tons of different sizes and thread patterns.
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#8 | |
Registered User
Join Date: Feb 2004
Location: Massachusetts
Posts: 269
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Quote:
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72 Cheyenne Super 4x4 SWB |
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#9 |
Registered User
Join Date: Sep 2003
Location: port allen louisiana
Posts: 207
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could you tap the flange to the next size bolt and just drill out your backing plate to fit new bolt size
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