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Stripped M8x1.0 bolts on TRD wheels - ideas??

Discussion in '2nd Gen. Tacomas (2005-2015)' started by SR-71A, Jul 5, 2023.

  1. Jul 5, 2023 at 5:24 AM
    #1
    SR-71A

    SR-71A [OP] Define "Well-Known Member"

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    Cross posting from the TX Baja thread for more visibility. Any ideas would be appreciated. Im supposed to get these mounted tomorrow morning..

    I'm in the final stages of getting my wheels back together after powder coating.

    Thanks to Maine's unhealthy obsession with using as much calcium chloride and road salt as possible, the surface between the rings and wheels was pretty rough. As are all the M8 threaded bolt holes. I'm sure you can see where this is going...

    So far I've stripped out 3 of those bolts, hardly past finger tight. Several more are close and will definitely strip out before they reach a decent torque

    Any thoughts on how I repair this cluster? I'm wondering if I can put some rtv in the hole, then thread the bolt in, let it set and snug it up. Not sure if I can helicoil these due to how close they are to the bead. Not even sure if they make helicoils in M8x1.0

    20230704_123050.jpg
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    Last edited: Jul 5, 2023
  2. Jul 5, 2023 at 5:48 AM
    #2
    AllTacosFloat

    AllTacosFloat Well-Known Member

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    Maybe a jb weld or metal epoxy? The play doh type. Fill the hole then try to drill and tap????
     
  3. Jul 5, 2023 at 6:07 AM
    #3
    shmn

    shmn Well-Known Member

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  4. Jul 5, 2023 at 6:09 AM
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    SR-71A

    SR-71A [OP] Define "Well-Known Member"

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    Thats not a bad idea if I could get it to stick. Even after blasting theres still some corrosion in there. Its hard to see in the pics above

    There are several different companies that make thread inserts for M8x1.0 in different lengths. Probably should get some of those on order
     
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  5. Jul 5, 2023 at 6:10 AM
    #5
    SR-71A

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  6. Jul 5, 2023 at 6:31 AM
    #6
    AllTacosFloat

    AllTacosFloat Well-Known Member

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    https://www.amazon.com/J-B-Weld-8267-SteelStik-Reinforced/dp/B00RN7CT2U?hvadid=312174136943&hvpos=&hvnetw=g&hvrand=11796504785815517395&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9057239&hvtargid=pla-406164801593&ref=&adgrpid=63790029762

    Has worked for me
     
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  7. Jul 5, 2023 at 12:04 PM
    #7
    SR-71A

    SR-71A [OP] Define "Well-Known Member"

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    I ordered a helicoil kit today, should be good to go once they get here. Might even just run duct tape to keep the loose bolts in while balancing tomorrow :D
     
  8. Jul 5, 2023 at 4:40 PM
    #8
    Waasheem

    Waasheem The catholic radio bear

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    If it’s decorative, jb weld. If it’s a true bead lock, a good thread repair insert like timesert.
     
  9. Jul 6, 2023 at 5:35 AM
    #9
    SR-71A

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    These are technically decorative, but do bear a bit of force every once in a while :D

    Ordered some threaded inserts last night, should be here in a few days hopefully

    20230305_160651_HDR.jpg
     
  10. Jul 6, 2023 at 6:17 AM
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    StuckinOhio

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    JB Weld and re-tap would be the easiest.
    Since the fastener is basically decorative, IMO, I wouldn't was the effort to heli-coil. The other bolts should be able to manage fastening. Since it is a steel fastener to alloy wheel, there is always opportunity to strip more, so limit on/off with final torquing.
    If you heli-coil, you will be removing material from the lip of the wheel so be careful not to over sink the boring drill. You will have to go deeper to account for the drill tip lead in angle. (Or plan for less thread engagement).
    Drilling on the lip of a wheel is risky. Since tires are mounted, deflate prior to repair, be safe about it.
    Theoretically, balancing should be done after repair, although 1/4 oz shouldn't make a difference.

    Another option would be cut-off the head of the Allen bolt and Jb weld it to the ring, definitely not a true fix, but would be the easiest. After mounting you, would be the only one that knows.
     
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  11. Jul 6, 2023 at 7:11 AM
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    deanosaurus

    deanosaurus Caveman

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    I would drill and tap to the next size up, be it metric or English (M8x1.0 = 7.974mm major diameter, M9x1.0 =8.974mm, 3/8-16 = 9.5mm), and put in some threaded brass with black Loctite - then D&T the brass back to M8x1.0.
     
    Last edited: Jul 6, 2023
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  12. Jul 6, 2023 at 9:53 AM
    #12
    BigCountry762x39

    BigCountry762x39 Well-Known Member

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    or... drill them all the way though and make them into real bead locks...:anonymous:

    jk but always cool to think way outside the box
     
    Last edited: Jul 6, 2023
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  13. Jul 6, 2023 at 10:14 AM
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    Bivouac

    Bivouac Well-Known Member

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    Remains to be seen I bought the tires and wheels the rest came along
    Have you tried a thread chasing tap at all?

    Though if the corrosion has eaten the material away that will not help.

    RTV might twist out faster then the corroded holes.

    I think the simple fix would be an epoxy that will bond to the wheel and is easy to tap.

    So many different epoxy blends now the perfect one should be easy to find.

    Thread inserts I think Would be a royal pain if you need to do 4 Wheels
     
  14. Jul 6, 2023 at 10:50 AM
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    SR-71A

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    Thanks for the suggestions.

    Yes I ran a bottoming tap through all 48 holes (by hand) before beginning reassembly. I think it actually made things worse, to be honest. The tap certainly disturbed whatever soft corroded metal was there

    I only have two that are completely striped out. Seven others feel very soft and I did not fully torque them, but technically those 7 are holding themselves. Plan to helicoil those two asap and monitor the other seven (at this point I dont want to disturb anything more than I have to).

    Everyone keeps mentioning filling with epoxy / JB weld. I like that idea, only thing Im hesitant about is making sure the new hole is centered and straight. Oversizing the existing hole for a short 8mm thread insert will be easier I think using the existing as a guide
     
  15. Jul 6, 2023 at 11:05 AM
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    Bivouac

    Bivouac Well-Known Member

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    Remains to be seen I bought the tires and wheels the rest came along
    Quite a difference between a thread chaser tap and a thread cutting tap.

    Then If I was doing this the tire would be off the wheel. The wheel on the drill press table.

    I would never attempt to drill the hole free hand . Let alone tap threads for a thread insert unless it was the only possible way. I have cobble together many fixtures to use The Mag drill for projects like this!

    Good Luck !
     
  16. Jul 6, 2023 at 11:15 AM
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    SR-71A

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    I wasnt able to find a reasonably quality M8x1.0 chaser that wasnt part of a whole kit, so tap it was. Like I say I did them by hand, but at any rate whats done is done

    And no, I definitely dont have any fancy tools to make this repair. A hand drill and patience is what Ill use to get the job done when the helicoils finally arrive :D
     
    Last edited: Jul 6, 2023
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  17. Jul 6, 2023 at 11:21 AM
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    AllTacosFloat

    AllTacosFloat Well-Known Member

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  18. Jul 6, 2023 at 11:43 AM
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    fatfurious2

    fatfurious2 IG: great_white_taco

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    I would have done a thread chaser instead of a tap. Like you said, sometimes the tap will loosen up something that shouldn't have been recut.. The chaser would have cleaned the threads I think?

    I dont have a suggestion for keeping the bolts in. Would blue locktite not work? or thread tape?
     
  19. Jul 6, 2023 at 12:19 PM
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    clenkeit

    clenkeit Well-Known Member

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    Those aren't helpful if his threads are messed up. The wheel is the threaded part, not the rock ring.
     
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  20. Jul 6, 2023 at 12:29 PM
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    SR-71A

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    The wheels are my issue, not the rings unfortunately

    Ended up going with some appliance tape as a temporary measure :D

    I think the brushed finish turned out pretty good all things considered. I know you and I had talked about that when you stopped by my neck of the woods a few weeks ago

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    20230705_165544_HDR.jpg
     
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