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how do you fix stripped threads?

Discussion in 'The Garage' started by colbystephens, Oct 4, 2006.

  1. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    so one of the tapped holes which is used to bolt the starter to the block on my engine is stripped. how do i go about repairing it? it's working fine right now to only have one bolt holding it on there, but i don't like that. i'm not familiar w/ how to tap holes or anything of that nature. a bit o help is appreciated.
     
  2. az-k5

    az-k5 1/2 ton status

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    Get a heli-coil. You drill the hole larger and tap it large then screw in a thread adapter of sorts.
     
  3. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    without using a drill press, how can i assure that i'm drilling straight upwards?
     
  4. az-k5

    az-k5 1/2 ton status

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    The existing hole won't let you go to far from strait.
     
  5. fabjunkie

    fabjunkie 1/2 ton status

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    Just keep the drill as straight to the block as you can. A little bit of variance won't hurt for what it is, and you only have to really worry about it at first. You can do it! All night long!
     
  6. muddybuddy

    muddybuddy 3/4 ton status

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    a firm grip and eagle vision. do you have a tap and die set?
     
  7. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    not yet... :o
     
  8. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    ya got that right. :cool:
     
  9. diesel4me

    diesel4me 1 ton status Premium Member

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    use...

    I use a peice of round stock as a guide while drilling a hole with a hand drill,to keep it square..a hunk of 1" round stock with the size hole your drilling in it,squared off on the end,held against what your drilling, works well to keep the drill aligned properly..

    Be aware Heli-Coils use a special tap to cut the new threads it screws into--they are NOT the same as ordinary taps!..also,other similar brands of thread repair inserts do NOT use the same taps as Heli-Coils!..once you get a Heli-Coil installed,they are usually permanent repairs..

    I've seen many 6.2's JUNKED because the starter bolts loosened up,and a chunk of the block got torn out!..I'd fix yours ASAP,or it'll suffer the same demise..:eek1:
     
  10. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    thanks for the tip, Diesel. in the 6.2 block, are there any oil passages that i need to be cautious of if i'm opening the hole up a bit? this is the hole on the outter passenger side.
     
  11. fabjunkie

    fabjunkie 1/2 ton status

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    I don't anything about 6.2's, but I'd think that you'd be safe on the outer hole. The Heli-Coil's will come with the tap you need to insert it.
     

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