Stripped sub frame

8 replies to this topic
  • dhend8

Posted April 11, 2016 - 04:25 PM


I just notice a couple days ago that the bolt that holds the sub frame to the frame was missing. So today I got a new bolt tryed putting it in and i noticed it was stripped. Any suggestions on what I could do? Would loctite do anything?20160411_184533.png

  • filterx

Posted April 11, 2016 - 04:44 PM


You could try tapping it with the same size tap first and use a new bolt first. If that doesn't work then re-tap with the next size up. Absolute worst case would be to drill it out smooth and use a new bolt with a nut on the back but before you do that...


If you can take it to a good machine shop or mechanic and see what they suggest

  • cesper

Posted April 11, 2016 - 04:58 PM


Time-sert would be the absolute best thing. They are pricey, but if you remove anything in the way and take it to a shop that has them, shouldn't be more than 0.5 labor or something like that.

  • filterx

Posted April 11, 2016 - 05:01 PM


And yes there will be some good other options

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  • Jlash

Posted April 11, 2016 - 06:12 PM


drill it out, tap it, and install a helicoil of the original bolt size

  • ThrustWasher

Posted April 11, 2016 - 06:56 PM


Put the same thread bolt in there thats a 1/2 longer than normal and put a locknut on the backside.

Edited by PelvicThruster, April 12, 2016 - 11:31 AM.

  • toten

Posted April 12, 2016 - 07:14 AM


I'd go with a longer bolt and nut (preferably nylock) if there's space for it. If there isn't, I prefer Timesert to Helicoil, but either will work. 


When it comes to bolts into aluminum threads, it's important to not overtighten. You're far better off torquing it a little light with loctite than cranking on it so it won't come out without loctite... of course, a torque wrench and proper torque AND loctite is the best option (unless you've calibrated your wrist that well).

  • problem_child

Posted April 15, 2016 - 09:42 AM


I'd get a new bolt and run a tap through it before heli coiling or going up a size

Edited by problem_child, April 15, 2016 - 09:43 AM.

  • shredmasterz

Posted April 17, 2016 - 12:00 PM


You can try the new bolt and tap idea but I think it is wishful thinking because the aluminum is likely stripped since it is much softer than the steel bolt.  I agree a Timesert is stronger than a Helicoil, but I would use whichever requires you to use the smallest hole size because the frame boss has limited material.  Another option could be to run a longer bolt and put a nut on the back.

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