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Broken Body Stud

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Old Jun 10, 2022 | 02:04 PM
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Broken Body Stud

Removing old running boards and one of the studs no longer held and I had to cut it off. I’m going to put on some new AMP boards so I’m figured I would run a grade 8 bolt as a replacement.
anyone run through this and has good tips it would be appreciated.

Stripped from body

Undamaged for comparison
 
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Old Jun 10, 2022 | 02:22 PM
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Did cut or have to cut?

If its still on there I would try and clamp some cheap harbor freight needle nose vise-grips on it. ground down to fit if necessary.

If memory serves, other threads say there is no good easy replacement. some mention “nut-serts”.

good luck. keep us posted on solution.

maybe a nut placed inside body and then threaded rod fed in with red death loctite on it. let it cure and gingerly tighten outer nut on running board bracket.

maybe antiseize that and remaining studs if you dont want to spin one again.
 
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Old Jun 10, 2022 | 03:03 PM
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I tried the needle nose locking pliers and no luck at all. The head of the stud just kept rounding off … even with a two handed death grip setting.
I got some metric 10.9 in various lengths and will run the nut into the channel and bolt it down.
Thinking about using a small strip of 3M to dampen and hold the bracket …
 
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Old Jun 19, 2022 | 04:52 PM
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The fix was as expected … had to cut off and drill out the broken stud. Got a couple of hardened metric bolts and after fermi I got the correct length I installed using the appropriate amount of permatex red. See photos

Correct length - can’t get a lock washer pn

Red death

Finished
 
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Old Jun 19, 2022 | 05:06 PM
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did you use a stainless bolt to help with corrosion?
 
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Old Jun 19, 2022 | 10:16 PM
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I didn’t. I used a coated M8 grade with liberal dose of 3-36 anti-corrosion for steel and aluminum. I will maintain a regular maintenance schedule for checking the area and application of 3-36.
 
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Old Jun 20, 2022 | 10:55 AM
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Curious how long before corrosion sets in if he did use stainless steel. Anyone up for that experiment?
 
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Old Jun 20, 2022 | 11:17 AM
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Originally Posted by acdii
Curious how long before corrosion sets in if he did use stainless steel. Anyone up for that experiment?
Years I would say based off my fleet experience.
 
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Old Jun 20, 2022 | 12:09 PM
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Originally Posted by 1olddogtwo
Years I would say based off my fleet experience.
the fix I used for a broken body stud was the same fix that my local Ford dealer would have done. The broken stud was steel per the dealership. They see this more and more on newer trucks.
if you’re bolting up to the body studs I recommend a good anti corrosion product as you bolt down to prevent seizing.
 
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Old Jun 21, 2022 | 08:20 AM
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Originally Posted by 1olddogtwo
Years I would say based off my fleet experience.
Six months in the salt belt. In that location, stainless steel, salt spray and aluminum are a bad combination. Fasteners in that location should be black oxide coated to prevent galvanic reactions.
 
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Old Jun 21, 2022 | 09:23 AM
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Originally Posted by acdii
Six months in the salt belt. In that location, stainless steel, salt spray and aluminum are a bad combination. Fasteners in that location should be black oxide coated to prevent galvanic reactions.
2020 F350 fuel tank, Chicago based truck. Just took these.



 
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Old Jun 21, 2022 | 09:46 AM
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What are they coated with? It is well known not to mix stainless steel with aluminum.

https://www.albanycountyfasteners.co...-and-aluminum/
 
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Old Jun 21, 2022 | 10:42 AM
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Originally Posted by acdii
What are they coated with?
Dirt, road grime.

Appears to be reg zine bolts.
 
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Old Jun 21, 2022 | 10:47 AM
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2017 550 steps

 
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Old Jun 21, 2022 | 02:00 PM
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Interesting how the nuts are rotted but the stud still looks good.
 
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