Kraton How to repair stripped bulkhead

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Captain Blaster

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Arrma RC's
  1. BigRock 4x4
  2. Kraton 6s
  3. Notorious
Just installed a fresh bulkhead/diff from Jenny's, and three of the four bolts that go up from underneath the chassis stripped the plastic out.
There's got to be a way to repair this! What about this: fill the holes with JB weld, or superglue, and jam a toothpick in there. Let it cure, then drill it out and screw bolts back in.
I don't want to waste another bulkhead. Any tips? Thanks!
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I've never seen anyone do it and haven't needed it myself but I was thinking heated inserts would work. Very common in 3d printing world and I don't know why they wouldnt work on nylon plastic (what rc mostly use). I believe @332_RC also got some tape that could be used for repairing threads?
 
I've never seen anyone do it and haven't needed it myself but I was thinking heated inserts would work. Very common in 3d printing world and I don't know why they wouldnt work on nylon plastic (what rc mostly use). I believe @332_RC also got some tape that could be used for repairing threads?
Not sure if this will hold the bulkheads down. It might repair some non critical composite threads. Might not hold tight enough for a bulkhead. I can't confirm.
Thread 'Vibra-Tite VC-3 Threadlocker Orange Tape for pillow ball retainers' https://www.arrmaforum.com/threads/...-orange-tape-for-pillow-ball-retainers.73911/
 
Another way is to superglue some ABS filament (preferably flattened) into the holes..
that will provide the necessary re-surfacing of the threads your looking for.
 
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That steel helical inserted properly into composite will be stronger than any monkey metal or 6061 series alloy in tensile thread pull strength.

Putting one in an aluminum timing cover to squeeze a water pump leak on a Hemi as we speak, m8x1.25

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How small do they make helicoil inserts? I have never used one on anything under 1/2” before. I know they make various sizes, but at some point it has to be impractical.
One of the adhesive companies makes an epoxy designed to be drilled and tapped. They give a torque rating for the fix, I just don’t remember the figure.
 
How small do they make helicoil inserts? I have never used one on anything under 1/2” before. I know they make various sizes, but at some point it has to be impractical.
One of the adhesive companies makes an epoxy designed to be drilled and tapped. They give a torque rating for the fix, I just don’t remember the figure.

Down to 1.6mm 👍🏼

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How small do they make helicoil inserts? I have never used one on anything under 1/2” before. I know they make various sizes, but at some point it has to be impractical.
One of the adhesive companies makes an epoxy designed to be drilled and tapped. They give a torque rating for the fix, I just don’t remember the figure.
I've installed as small as 10-24 & M6 at work in aluminum.
 
I've installed as small as 10-24 & M6 at work in aluminum.
I knew they made fractional inch sizes down to 1/4” or so, just didn’t imagine smaller than about that. For wood we used blind nuts to create threads down to 6-32 or so.
 
How do you prevent it besides driving better
Don’t torque them with electric screwdrivers or drills. I have a wimpy electric screwdriver which is perfect. I seat them lightly then final tighten by hand only. I’ve bent chassis’ before in hard impacts before any bulkheads ever stripped out.
 
I just recently stripped my 8s outcast bulkhead which was a doozy of a repair, saw some dude on reddit posted these pictures about using nutserts to fix it more aggressively without buying aluminum bulkheads. I just got new bulkheads on jennys but I'm gonna give this a shot to the one I pulled off and if it happens again give this a go.
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