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Technical How to attach acorn nut covers for flathead head bolts?

Discussion in 'Traditional Hot Rods' started by djmahle, Aug 1, 2016.

  1. djmahle
    Joined: Jun 27, 2009
    Posts: 11

    djmahle
    Member
    from Minnesota

    I am finishing up a Model A roadster that has an 8BA flathead from a 50 Ford. The engine came with some die cast chrome acorn nut covers for the head bolts that were never installed. . They are a rather loose slip fit so I was wondering what others have done to keep them in place. A dab of silicone? Liquid Nails? Any suggestions appreciated. Thanks
     
  2. 19Fordy
    Joined: May 17, 2003
    Posts: 6,888

    19Fordy
    Member

    Just a dab of silicone works fine. These have been on 20 years.
     

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    dan c likes this.
  3. Yep that's what I have done in the past. Works like a champ. ^^^^^
     
  4. Kan Kustom
    Joined: Jul 20, 2009
    Posts: 2,618

    Kan Kustom
    Member

    Always wondered this myself , knowing you have to remove them some time for repairs, paint ,etc.
     

  5. jcmarz
    Joined: Jan 10, 2010
    Posts: 4,636

    jcmarz
    Member
    from Chino, Ca

    Liquid Nails:rolleyes:
     
    falcongeorge likes this.
  6. 4dFord/SC
    Joined: Sep 12, 2004
    Posts: 837

    4dFord/SC
    Member

    RTV works too.
     
  7. cs39ford
    Joined: May 1, 2012
    Posts: 798

    cs39ford
    Member

    image.jpeg
    That's the fix
     
  8. 19Fordy
    Joined: May 17, 2003
    Posts: 6,888

    19Fordy
    Member

    Remember, Just a little dab will do ya. Don't go nuts.
     
  9. Kiwi 4d
    Joined: Sep 16, 2006
    Posts: 2,808

    Kiwi 4d
    ALLIANCE MEMBER

    Even the plastic covers you can give a little squeeze in your vice and it doesn't seem to mark them and they hold the new shape. Or as said silicone.
     
  10. CME1
    Joined: Aug 10, 2010
    Posts: 144

    CME1
    Member

    I too have used a little dab of clear silicone on the Acorn Nut Covers, works like a champ! Cleans up easy when you need to remove them. Cool thing is we all have a tube of silicone in our tool chest!
     
  11. i.rant
    Joined: Nov 23, 2009
    Posts: 2,955

    i.rant
    ALLIANCE MEMBER
    from Illinois
    1. 1940 Ford

    I used to tap one edge with a center punch after they were installed.
     
  12. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,839

    Mike51Merc
    Member

    Some dum-dum, ribbon caulk, or electrician's putty works great, is reusable and doesn't harden like glue or silicone.
    I used to peen one side with a center punch before I discovered the putty method.
     
  13. Gene Boul
    Joined: Feb 9, 2006
    Posts: 805

    Gene Boul

    I tried RTV on my nut covers, big mistake. Burned like a bitch....dam-it!
     
    1927graham likes this.
  14. elmitcheristo
    Joined: Nov 10, 2007
    Posts: 351

    elmitcheristo
    Member

    I use a paper match. Slide it on with the match and rip off the remainder.
     
  15. 3340
    Joined: Jun 4, 2010
    Posts: 557

    3340
    Member

    Compressed with soft jaws slightest pressure in vise.
     

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  16. Jeff34
    Joined: Jun 2, 2015
    Posts: 446

    Jeff34
    Member

    Pun intended?
     
    Atwater Mike likes this.
  17. Bearing Burner
    Joined: Mar 2, 2009
    Posts: 874

    Bearing Burner
    Member
    from W. MA

    It's a lot easier to use acorn nuts.
     
  18. Hi temp silicone! Just a dab!!
     
  19. Strange but the ones I had were so tight I used a rubber mallet and tapped them in place. HRP
     
  20. LOWDUG37
    Joined: Jan 31, 2007
    Posts: 860

    LOWDUG37
    Member

    same here
     
  21. Atwater Mike
    Joined: May 31, 2002
    Posts: 10,225

    Atwater Mike
    ALLIANCE MEMBER

    The pre-'48 nuts are larger than the '49-'53 bolt heads by a few thousandths.
    Acorns usually fit the nuts tight, were loose on the bolts.
    As Pocono Region Mike said above, I used plumbers' dope. (it was in 1956!)
     
  22. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,839

    Mike51Merc
    Member

    Yeah, but plumber's putty hardens like a rock. Electrician's putty stays pliable.
     

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