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Anyone every heard of a "thread chaser"?

Discussion in 'Hangout Lounge' started by tabaka45, Oct 20, 2013.

  1. tabaka45

    tabaka45 Well-Known Member

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    I have a friend who has screwed up the first 3-4 threads in one spark plug hole. He found a motorcycle shop that said they had a "thread chaser" that could fix the threads. Apparently the tool is inserted into the plug hole and inside the chamber and then expanded and screwed from the inside out repairing the threads and pushing any debris out the top. Has anyone ever seen or used one?
     
    tabaka45, Oct 20, 2013
    #1
  2. MiCarl

    MiCarl Active Member

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    What you're describing is called a back tap. A bit different device than a thread chaser.

    Yep, I've used them. They do an adequate job.

    What they do is cut debris out of the original thread, they do not re-fill the new threads cut by forcing a plug in incorrectly. Plugs need to be reinstalled carefully (forever) or you'll get them into the "wrong" thread and rebugger the hole.
     
    MiCarl, Oct 20, 2013
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  3. Polock

    Polock Well-Known Member

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    Polock, Oct 20, 2013
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  4. KDub

    KDub Member

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    Surely a time-sert or similar would be a better fix?
     
    KDub, Oct 21, 2013
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  5. davec

    davec Member

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    i stripped first 3-4 threads on #4 cyln, i thought about using a back tap..i ended up using a thread chaser..(very carefully) worked great..cost me 14 bucks with the grease.
     
    davec, Oct 21, 2013
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  6. MiCarl

    MiCarl Active Member

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    Sure it is. A whole different $$ proposition though.
     
    MiCarl, Oct 21, 2013
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