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Best method to fix a stripped bolt hole?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by DPI, Nov 20, 2001.

  1. DPI

    DPI 1/2 ton status

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    I stripped out one of my bolt holes that hold the spring plate to my dana 60 a couple nights ago. Any suggestions on a fix? I am thinking of doing the heli-coil thing, but wanted to know if there is any better way to go. Also, how many ft lbs of torque needs to be used to tighten these down?

    4.56 Geared, Power Locked, Dana 60
    4.56 Geared, TSM Disc Braked, Detroit Locked, Corporate 14
     
  2. ftn96

    ftn96 1/2 ton status

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    I dont know bout that. I'd feel safer going ahead and tapping it out to the next size bolt.

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  3. BrianK5

    BrianK5 Registered Member

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    You're going to have to drill and tap it no matter what. If you go with the Heli-coil, you tap it to the size the coil calls for. If you tap it for the next bolt size up, you will have to enlarge the hole on the spring plate too.
    Heli-coil is the way to go if you want to retain the same bolt size.

    Brian

    1985 K5 Blazer
     
  4. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    DP,

    I don't know about the best thread repair....but for the torque needed I'd say use a little LESS than you did last time!!!! [​IMG]

    Somebody ate their Wheaties!



    -Greg72

    '72 K5 Blazer - 427BB/TH350/NP205/6" Lift/35x12.50's
    <font color=blue>See it here: </font color=blue><a target="_blank" href=http://coloradok5.com/gallery/albun38>http://coloradok5.com/gallery/albun38</a>
     
  5. solowookie

    solowookie 1/2 ton status

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    oh yea... Heli-Coil... [​IMG] man those things are awesome!

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  6. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    If you know somebody who is good with a welder (and knows his metals and rods), you can weld that puppy up and tap it to the same size hole it used to be. If done right it is as strong or stronger than the original and you won't have to buy the heli-cole or installation tool (if you go the heli-cole route), or enlarge the hole in the spring plate (if you decide to tap it the next size up route).

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot> click here </a>
     
  7. chevyracing

    chevyracing 1/2 ton status

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    If you use a heli-coil make sure you buy a good one, don't get cheap ones. Good ones are made out of stainless steel or some other hard steel. Cheap ones, like the$4.99 kits at Wal-Mart (can I say Wal-mart on here?) will give you grief. NAPA sells good ones.

    John

    PS. a little JB Weld when you put it (heli-coil) in works good to, jst a little though.

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>See my pics here</a>
     
  8. DPI

    DPI 1/2 ton status

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    Thanks for the replies. I can't believe we have some funny comedians on this board [​IMG].
    After pricing the 5/8"-11 heli-coil repair kit. I am going to go up to the 3/4" bolt.
    Oh, the kit was $60 at Napa + $25 for the drill bit.
    The 3/4" tap was $15 and I already have the 11/16" bit. Plus this will be as strong or stronger than the heli-coil method.
    Thanks again for the responses!!
    dp



    4.56 Geared, Power Locked, Dana 60
    4.56 Geared, TSM Disc Braked, Detroit Locked, Corporate 14
     
  9. dyeager535

    dyeager535 1 ton status Premium Member

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    Hell, just go buy a thread sert!!! It just requires standard taps, and 3/8" ones locally are $2.50 a piece, so a 5/8" can't be anywhere near $85!!!

    Anyone that recommends heli coils, why would you use one over a thread sert? (actual question, not sarcasm)


    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  10. MaxCrack

    MaxCrack 1/2 ton status

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    <a target="_blank" href=http://photos.yahoo.com/bc/dana60manual/vwp?.dir=/Dana+60+Manual&amp;.dnm=page18.jpg&amp;.src=ph&amp;.view=t&amp;.hires=t>Torque specs</a>

    A computer once beat me at chess, but it was no match for me at kick boxing.
    <a target="_blank" href=http://photos.yahoo.com/dana60manual>http://photos.yahoo.com/dana60manual</a>
     
  11. DPI

    DPI 1/2 ton status

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    COOL, THANKS!!!

    4.56 Geared, Power Locked, Dana 60
    4.56 Geared, TSM Disc Braked, Detroit Locked, Corporate 14
     
  12. 502Burban

    502Burban 1/2 ton status

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    Dorian,

    I wasn't aware that there was a difference between thread serts and heli coils. Was under the assumption that they are the same things with different brand names. Is there a functional difference or are they just the same thing with different pricing and names? Sorry if this is a stupid question, but now you've got me curious.

    Thanks,

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  13. dyeager535

    dyeager535 1 ton status Premium Member

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    Thread serts are darn easy IMO.

    Basically, you tap the hole out (drill and tap, but these are standard bits and taps, not some funky pitch) to the next larger size, 7/16-1/2" etc, then use a flat blade screwdriver (has two slots cut in it, so you can do it with a flat blade) to thread it in flush. Has "solid" loc-tite already on it, so it locks in place pretty good, but I guess if you had to, you could remove it. (never tried)

    The thread sert is solid, unlike a heli coil, and leaking (as in an AL intake thermostat housing bolt hole) is not an issue.

    The only thing that I can say might be an advantage with the heli-coil, is that I am pretty certain they claim to get even "tighter" the more you tighten the bolt. Threadsert MIGHT be able to turn once its in place, but again, I've never had that problem.

    Friend of mine does all his AL intakes with them (that he races with) since the intakes strip out so easily after you remove the bolts so many times.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  14. 502Burban

    502Burban 1/2 ton status

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    Thanks for the explanation, Dorian. I love this web site. Not too many places you can go to learn something new every day!

    Sounds like the thread serts are the hot tip. Good to know there is an alternative. I've always hated the stupid little tool they include with heli coils, anyway.

    Take care,

    Robb
    '73 GMC Suburban - 502DFI
    <a target="_blank" href=http://community.webshots.com/user/robbrj>community.webshots.com/user/robbrj</a>
     
  15. ftn96

    ftn96 1/2 ton status

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    "THE BEST WAY" is to get a new Dana 60 and send that one to me!!!! [​IMG]

    Surgeon General's Warning:
    Viagra and steroids may be harmful to your spouse![​IMG]
    <a target="_blank" href=http://www.nashvillek5.freeservers.com>www.nashvillek5.freeservers.com</a>
     
  16. HarryH3

    HarryH3 1 ton status Author

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    Dorian, where are the thread serts available? Sounds like a great thing to keep around the garage. [​IMG]

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  17. dyeager535

    dyeager535 1 ton status Premium Member

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    We have a local hardware store "chain" that is one of the GOOD ones. You know, people actually ask if you need help, they know where everything in the store is, people have worked there for 25 years, etc. They are a pretty large store, so a local Ace probably won't have them. But they might.

    Anyway, thats where I get them. Before I knew that they had them I was able to get them at nut and bolt supply places, (look them up in the phone book) but they were about double what I pay for them at the local hardware store.


    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  18. dyeager535

    dyeager535 1 ton status Premium Member

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    BTW, heres some info. I hate .pdf's, sorry about the second one, better pictures though, second item.

    http://www.engineeringfindings.com/cat21/p221.pdf

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>www.dorianyeager.com/index2.html</a>
    Why insist on counting when the ring gear has the tooth counts stamped in?
     
  19. BrianK5

    BrianK5 Registered Member

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    Threadserts are new to me and they do look easier to use (and cheaper) than helicoils. Thanks for the tip.

    Brian

    1985 K5 Blazer
     

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