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loose threads in fuel block,how to fix ?

Discussion in 'The Hokey Ass Message Board' started by GARY T., Feb 1, 2011.

  1. GARY T.
    Joined: Mar 23, 2008
    Posts: 1,985

    GARY T.
    Member
    from S.W. Pa

    I have an aluminum fuel block that I want to use,but some of the threads in it are loose. Once I screw the hose nipples into it I don't ever plan on taking them out. I was thinking about putting JB weld on the threads and screwing them in. Do you think that would work,or is there something better? Don't want to go the heli coil route and don't want to buy a new block.
     
  2. Rob Paul
    Joined: Nov 11, 2005
    Posts: 1,273

    Rob Paul
    ALLIANCE MEMBER

    Tap them one NPT size bigger. If its 1/8" make it 1/4"NPT if its 1/4" make it 3/8" NPT.

    Or weld it up and re-drill and tap.
     
  3. fast30coupe
    Joined: Nov 15, 2009
    Posts: 1,019

    fast30coupe
    Member
    from Illinois

    go a size up with the fuel nipples use the same size hose.
     
  4. i wasn't sure if they made Helicoils for pipe threads , but a google search found that they do. i'd probably go that way over JB weld , even though it is fuel resistant and would probably be fine

    what size thread is it?
     

  5. GARY T.
    Joined: Mar 23, 2008
    Posts: 1,985

    GARY T.
    Member
    from S.W. Pa

    Already bought 1/8 NPT chrome plated brass nipples---threw packaging away--can't return--would like to use them will only be running 2---21/2 lbs pressure
     
  6. budd
    Joined: Oct 31, 2006
    Posts: 3,478

    budd
    Member

    could you maybe make a spot for an o-ring to sit up by the top end?
     
  7. gmgrunt
    Joined: Feb 26, 2005
    Posts: 286

    gmgrunt
    Member

    If you can machine the block shorter which would allow you to drill and tap deeper into the block.
     
  8. go up one size then bush it down to the size nipples
     
  9. F&J
    Joined: Apr 5, 2007
    Posts: 13,221

    F&J
    Member

    You can fix it without resorting to JB.

    Find some 1/8 to 1/4 NPT adapters that have the hex. Retap your block to 1/4, then screw in the adapters with a sealer. Then carefully saw off the hex part and file the adapers to be flush with the block and it should be barely noticable. Then screw in the new 1/8 fittings you have.

    You may need to tap the internal 1/8 thread a little deeper after shortening the adapters.
     
  10. aaggie
    Joined: Nov 21, 2009
    Posts: 2,531

    aaggie
    ALLIANCE MEMBER

    It just seems strange to me that spending all of the time and money to build a car that you would chance burning it down to save a few dollars on a new fuel block.

    Most of the suggestions on how to jury rig a fix would probably work but just buy a new one.
     
  11. F&J
    Joined: Apr 5, 2007
    Posts: 13,221

    F&J
    Member


    X f'n 2


    Man, wth...nobody can FIX anything here without the 1-800 crowd acting up?


    I just assumed this was a vintage block worth fixing.
     
  12. GARY T.
    Joined: Mar 23, 2008
    Posts: 1,985

    GARY T.
    Member
    from S.W. Pa

    I've always heard good things about JB weld they say you can drill & tap it so I just thought maybe it would work for me --Have you priced a fuel block lately? If not JB weld,I'm sure there must be something on the market to take up some slack in threads
     
  13. new ones probable [likely] made in china. threads, finish, fit better?
     
  14. onlychevrolets
    Joined: Jan 23, 2006
    Posts: 2,307

    onlychevrolets
    Member

    JB Weld is a good product, but I wouldn't risk setting my ass on fire just to use it. Drill it, tap it the next size up like these guys told ya and be done with it. Shit I could have already fixed it in the time it took to post all this crap.
     
  15. Vee 888
    Joined: May 23, 2010
    Posts: 33

    Vee 888
    Member
    from texas

    Jury rig. Old navy term I believe. ie to get you home when things are bad.
     
  16. GARY T.
    Joined: Mar 23, 2008
    Posts: 1,985

    GARY T.
    Member
    from S.W. Pa

    anyone ever use this stuff?

    SEAL ALL
    <table><tbody><tr><td id="product-price-rating-desc"> Clear compound withstands changes in climate, toughens with age, never becomes brittle. Seals leaks in gas tanks (without draining contents), radiator and heater hoses, etc. Acts as a glue, cement, and sealant with unlimited application.Eclectic 380012 Seal-All 1 oz All Purpose Adhesive, Clear Features:; No mixing, no heating; For making all types of repairs to wood, glass, fabric, leather, metal, pipe, porcelain, crockery, and most rubber; Not affected by gasoline, water, oil, alcohol, naphtha or climatic conditions; Versatility and toughness; Seals, mends, bonds, insulates, and waterproofs.
    <form method="POST" action="/shoppinglist" id="addToWishList0"> <input name="action" value="AddResearchItemIdOnly" type="hidden"><input name="ImageURL" value="http://lh4.googleusercontent.com/public/3ICRGmQKwXqrDhsf8qTCgz-wS9y0SxiLcx6CVJW_LhyyoHba84N70JhijcqD-JpYCYxJG8RPq32x9HVY4bD41RVkXl8du82pJ4B8FLWkKwL-eXR4M_kgweUExnEZ1WcVQJsqoomoG8Vax1mbcWh_GYOWwQOKiCo_k90rR3GGAN6-jtWs7kbCPpu4u4Gr3GSLRHlVvZSrrAh-di1dc6BqxKViawd433GPurKQ6I8bo1n_U_OK3VD3afVRyqsxoW7ZntFINpHWUArWdl0aXEzo8pMboPxLNmSGGP7_N7LMj4c1IPOGtjafmFofnWvCTcic4JPdt1x7cOcMSfOtbsQ3nJ8qAxAS2mOvUYPx1wTZvA" type="hidden"><input name="SearchQuery" value="seal all" type="hidden"><input name="Token" value="c12fb3656ce196b0b0fc2bce58b88e57d4c8a3b" type="hidden"><input name="Merchant" value="_CATALOG" type="hidden"><input name="Language" value="en" type="hidden"><input name="Country" value="US" type="hidden"><input name="Currency" value="USD" type="hidden"><input name="OfferID" value="4616514346911694699" type="hidden"><input name="hl" value="en_US" type="hidden"><input name="TimezoneOffset" value="300" type="hidden">Add to Shopping List </form>

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    </td></tr></tbody></table>
     
  17. llonning
    Joined: Nov 17, 2007
    Posts: 680

    llonning
    Member

    ^^^^ Use it all the time with small engines, works great.^^^^^
     
  18. budd
    Joined: Oct 31, 2006
    Posts: 3,478

    budd
    Member

    the tough part of answering your question is were not holding it on our hands and don't really know how loose it is, you may just have some crappy barb fittings, maybe some gas fitters tape would be enough, take some pics so we can see what your dealing with, i have used seal all many times but never on a barb fitting, if it were mine i'd just make my own barb fittings.
     
  19. handyandy289
    Joined: Sep 19, 2010
    Posts: 354

    handyandy289
    Member
    from Georgia

    If you don't want to fix it properly, then invest in a good fire extinguisher. They cost about as much as another fuel block. You have received several good suggestions and you keep looking for a quick fix. Why ask for suggestions that you reject?
     
  20. yekoms
    Joined: Jan 21, 2007
    Posts: 1,088

    yekoms
    Member

    Can the block be counter bored so the fittings go in deeper?
    Finger tight a fitting into block and show us a picture of it...
    Smokey
     
  21. fbama73
    Joined: Jul 12, 2008
    Posts: 989

    fbama73
    Member

    I'd stay away from all of the "Mechanic in a tube" fixes. Seriously.

    If there's enough meat in the casting, go the next size bigger. Otherwise go with an insert
     
  22. GARY T.
    Joined: Mar 23, 2008
    Posts: 1,985

    GARY T.
    Member
    from S.W. Pa

    I'm not rejecting any suggestions,and I appreciate them all,but there is no harm in getting different opinions---that is how you might learn something you didn't know
     
  23. RichG
    Joined: Dec 8, 2008
    Posts: 3,919

    RichG
    Member

    The politically correct police changed it to jury rig, but "jerry-rig" would be the traditional term.:p
     
  24. GARY T.
    Joined: Mar 23, 2008
    Posts: 1,985

    GARY T.
    Member
    from S.W. Pa

    here are pics,they are screwed in as far as I could by hand---you will notice that a couple are all the way in and a little shaky-----I probably will drill & tap them out to 1/4" NPT and use reducers,but good to get opinions
    THANKS
     

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