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  1. #1
    No fat chicks letsrunem's Avatar
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    I need 1 stock used LS1 headbolt

    Need to make a tap to clean out the holes in my block because the cheapest tap I've found is $124!! Anyone have one laying around?
    McCormick's Speed Shop built

    1991 Mustang LX *parting out*
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  2. #2
    Senior Member..now yer posting!
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    What size and pitch tap do you need?
    1968 Mustang GT Coupe, 302 J-code, 3-speed, 9" 3.25 open diff., 1 of 1.
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  3. #3
    La Gran G turbogarrett's Avatar
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    I've got em if you want to pick them up.
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  4. #4
    TRY AGAIN SLOWC5's Avatar
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    I'm sure I have one at the shop, location is waukesha. I'll be there tonight from 3:30 til late

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  5. #5
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    I have a few of them already ground down for that same purpose. Large ones and the small ones for the top row.

    You can have them if you'd like. PM me if interested, I'll be around all day today and tomorrow.


    Quote Originally Posted by portponies View Post
    What size and pitch tap do you need?
    If I recall, the LS head bolt thread is M11 x 2.0, which is very unique thread size, and why the tap is so expensive (if you can even find one).

    Taps aren't meant to chase existing threads anyways, they are made to cut new threads. They of course work for cleaning purposes, but that's a quick way to dull a tap. ARP makes a chaser in this thread size for this exact purpose, but it too, is not cheap, and not worth it unless you do this job often.
    A stock head bolt with a flat or two ground into the threads works just fine at getting the junk out.


  6. #6
    No fat chicks letsrunem's Avatar
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    Quote Originally Posted by Yellow2k1vette View Post
    I have a few of them already ground down for that same purpose. Large ones and the small ones for the top row.

    You can have them if you'd like. PM me if interested, I'll be around all day today and tomorrow.




    If I recall, the LS head bolt thread is M11 x 2.0, which is very unique thread size, and why the tap is so expensive (if you can even find one).

    Taps aren't meant to chase existing threads anyways, they are made to cut new threads. They of course work for cleaning purposes, but that's a quick way to dull a tap. ARP makes a chaser in this thread size for this exact purpose, but it too, is not cheap, and not worth it unless you do this job often.
    A stock head bolt with a flat or two ground into the threads works just fine at getting the junk out.


    Yup M11 x 2.0 I looked EVERYWHERE, everyone said they had never even heard of it. At Ace Hardware the guy asked me what it was for. I said an LS1 he's like what's that, some Mitsubishi motor or something? lol Thanks for the replies guys.
    McCormick's Speed Shop built

    1991 Mustang LX *parting out*
    2000 Civic

  7. #7
    I am almost positive I have some bolts laying around. pm me if you cant get any soon enough for ya.

  8. #8
    dude, i pm'd you on ls1tech. ive got a whole set if you want them.
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  9. #9
    No fat chicks letsrunem's Avatar
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    Quote Originally Posted by 2000navyz View Post
    dude, i pm'd you on ls1tech. ive got a whole set if you want them.
    I think me pm box was full at the time! Thanks for the offer though, just picked some up tonight and they work great. Thanks Tom!!
    McCormick's Speed Shop built

    1991 Mustang LX *parting out*
    2000 Civic

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