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#1 |
Registered User
Join Date: Sep 2014
Location: Granbury TX
Posts: 33
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Threads rusted out-need help!
After being off my truck for 4 years we finally were ready to put my front end back on last night. The issue now is when I took the front end off 2 of the bolts brought the threads with them. Now I have 2 holes in my firewall/cab that I cant run bolts into. I need suggestions on what to do now. Can you put some sort of thread repair in the hole? How about a rivnut? Thanks in advance!!
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#2 |
Moderator
![]() Join Date: Dec 2012
Location: ON, Canada
Posts: 2,187
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Re: Threads rusted out-need help!
Tap them for new bolts.
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#3 |
It's Better With Nitro
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,262
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Re: Threads rusted out-need help!
Depending on the condition of the steel around the area, I would probably install a nutcert. I had to do that on several of the locations that had a welded nut on the backside of the panel that broke off.
__________________
1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#4 |
Registered User
Join Date: Sep 2014
Location: Granbury TX
Posts: 33
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Re: Threads rusted out-need help!
I was concerned there wasn't enough meat there to just drill and tap it.
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#5 |
Registered User
Join Date: Sep 2014
Location: Granbury TX
Posts: 33
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Re: Threads rusted out-need help!
Vin63 do your have local place to find nutcerts or just order online?
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#6 |
Moderator
![]() Join Date: Dec 2012
Location: ON, Canada
Posts: 2,187
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Re: Threads rusted out-need help!
I wouldn't drill it. Just tap. I did this for my tailgate bolts, turned out fine. Drilling removes material. Tapping just cuts fresh threads, and that's what you need.
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#7 |
Registered User
Join Date: Aug 2013
Location: Muskegon Michigan
Posts: 37
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Re: Threads rusted out-need help!
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#8 |
Registered User
Join Date: Oct 2016
Location: Pa
Posts: 69
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Re: Threads rusted out-need help!
if they are the same size as the door bolts and the bed bolts, get a 3/8 tap and put it on a drill. run it in and out and be done, 3/8" bolt will fit fine.
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#9 | |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Threads rusted out-need help!
Quote:
in a chuck with 3 jaws ron |
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#10 | |
It's Better With Nitro
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,262
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Re: Threads rusted out-need help!
Quote:
https://www.fastenal.com/products/fa...%20Nuts%22%7C~ You'll need to get a nutsert tool like this one. If you have a couple of stripped blind nuts, you'll probably have more, so this will come in handy for this and other projects you have: http://www.tooltopia.com/marson-3930...gmuRoCEY3w_wcB
__________________
1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#11 |
Registered User
Join Date: Jan 2013
Location: Calgary Alberta
Posts: 1,170
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Re: Threads rusted out-need help!
I would not use a rivnut just because with the environment it is in next time someone has to take the bolts out they will be rusted in and the rivnut will just turn.
Going up one size or maybe even try metric to find one slightly larger than original would be my choice. |
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#12 |
Registered User
Join Date: Sep 2014
Location: Granbury TX
Posts: 33
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Re: Threads rusted out-need help!
Thanks guys for all the help!
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#13 |
Registered User
Join Date: Oct 2016
Location: Pa
Posts: 69
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Re: Threads rusted out-need help!
just a quick addition, I did all 12 door holes and 4 tailgate hinges. All threaded perfectly with the oversize 3/8 bolts. I did have to go to the junkyard since I only had three of the longer bolts. I know its not perfect, but using a round tap in a drill jaw worked fine in my makita drill. There was plenty of material to cut for the new size.
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#14 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Threads rusted out-need help!
mind you one can go past the square mounting part to round shank is what you did I take it.. so did you use an oversize 3/8 to go with you oversize 3/8 bolts. I have never seen oversize 3/8 olts
ron |
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#15 |
Registered User
Join Date: Oct 2016
Location: Pa
Posts: 69
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Re: Threads rusted out-need help!
3/8 is the next size up. try one on the unmolested holes and it will not fit in there. you also want a coarser thread than the fine thread originally in the metal piece.
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