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Technical Flathead dodge head bolt question

Discussion in 'The Hokey Ass Message Board' started by rusty rocket, Oct 17, 2020 at 6:31 PM.

  1. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    I scored an Edmunds aluminum head last week so I’ve pulled the cast head and am ready to bolt the new head on. The stock head bolts didn’t use a washer but I think there should be a washer on the aluminum head, also the bolts go into the water jacket What’s the best sealant to put on the threads? C29E8489-AAE5-491B-A6F3-CD4CEDFF9E5B.jpeg 61219BFB-0AA3-4C6B-BCF3-3E4C71B66FE0.jpeg
     
    j hansen and loudbang like this.
  2. drtrcrV-8
    Joined: Jan 6, 2013
    Posts: 1,308

    drtrcrV-8
    Member

    I'll let others give their favorites, but how 'bout some pics of your CAR???
     
  3. plym_46
    Joined: Sep 8, 2005
    Posts: 3,987

    plym_46
    Member
    from central NY

    When I put mine on I used flat washers based on what I had seen on several various Chrysler products with Fenton, Edmunds, and a couple others. Supposed to take compression up to the 8.5 / 9 to 1 neighborhood. Did you check it for warpage?
     
  4. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,501

    greybeard360
    Member

    Silicone pipe thread sealer ( the paste, not tape ). Works great.
     

  5. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    Yes I laid an aluminum level across it, everything looks peachy.
     
  6. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    Oh man there’s Tons of them out there. I do have a build thread titled save of the day
     
  7. Teflon?
     
  8. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,501

    greybeard360
    Member

    Yes...... Duh. Got my slick stuff mixed up. Could be why my shoes won't stay on my feet.
     
    J. A. Miller likes this.
  9. Budget36
    Joined: Nov 29, 2014
    Posts: 3,878

    Budget36
    Member

    I used permetex sealant when I put my 218 together. I did put washers on it, was a stock iron head, ran and didn’t weep for two years on near daily basis before I pulled it and sold it.
     
  10. dwollam
    Joined: Oct 22, 2012
    Posts: 1,086

    dwollam
    Member

    Use hardened washers on the aluminum heads.

    Dave
     
    ottoman and LWEL9226 like this.
  11. junkman8888
    Joined: Jan 28, 2009
    Posts: 478

    junkman8888
    Member

    Another issue to check is if the head bolts are the right length as sometimes the bolt bosses on aluminum heads end up being thicker than the bosses on cast-iron heads. Best of luck with your project.
     
    loudbang likes this.
  12. Hud I
    Joined: Jul 19, 2008
    Posts: 161

    Hud I
    Member
    from Tennessee

    The use of washers are a must. The use of hardened washers are preferred. The most important thing about going to a alum. head is torqueing the head. Alum. heads are torqued stone cold. When you retorque the head, do it with everything stone cold, not warm. I usually let them set overnight. You will have to retorque it more than once. Alum. heads are known to be bad to leak. This is why retorqueing the head more than once is necessary. Hope this helps.
     
  13. I use a product called PST by Permatex. I also suggest using hardened washers. I’m not familiar with Chrysler six head gaskets, but on head gaskets that don’t have a coating on them, I also use Copper Spray Gasket sealer.


    Sent from my iPhone using The H.A.M.B. mobile app
     
  14. noboD
    Joined: Jan 29, 2004
    Posts: 7,250

    noboD
    Member

    I agree with David, available from McMaster-Carr. From what I can see of the body I think I like it. Where are the other pictures?
     
  15. dwollam
    Joined: Oct 22, 2012
    Posts: 1,086

    dwollam
    Member

    Our local Ace hardware stocks hardened washers.

    Dave
     
  16. noboD
    Joined: Jan 29, 2004
    Posts: 7,250

    noboD
    Member

    Ours is barely open, Dave. I know the brown truck will bring them.
     
  17. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    Here ya go. 9E9451F1-7553-4551-B0D4-65F9FF3185DE.jpeg 8F7836A1-81EF-4904-9D40-DE55C64DBFC5.jpeg
     
  18. noboD
    Joined: Jan 29, 2004
    Posts: 7,250

    noboD
    Member

    Looks like a lot of fun. Thanks.
     
  19. hemihotrod66
    Joined: May 5, 2019
    Posts: 212

    hemihotrod66
    Member

    I would replace the bolts with studs....
     
    Paul likes this.
  20. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    Not gonna happen. 620B7905-8D29-43D7-BEAC-0EB6A3CDCF1B.jpeg
     
  21. Limey Kid
    Joined: Mar 5, 2006
    Posts: 1,012

    Limey Kid
    Member

    I suppose that sorta looks cool. He said begrudgingly. Jealousy is a terrible thing. Actually looks brilliant!
    Cheers,
    Stewart.
     
  22. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    Hahaha! Thanks Stewart, so here’s the kicker last Saturday I was GIVEN this head from an old hotrodder that said it had been on a shelf in his garage for nearly 50 years. He told me he would rather see it on my car than on the shelf in his garage or money in his pocket. Damn lucky I am!!!
     
  23. plym_46
    Joined: Sep 8, 2005
    Posts: 3,987

    plym_46
    Member
    from central NY

    What spark plugs are you going to run? Might want to pole the folks running similar heads. If I recall the standard plugs are shrouded in the aluminum head. I will screw in an AC45 tommorow and let you know.
     
    Last edited: Oct 18, 2020 at 9:38 PM
  24. rusty rocket
    Joined: Oct 30, 2011
    Posts: 3,918

    rusty rocket
    Member

    I did check that and they were in the head a bit. I’ll see how it work I guess.
     
  25. plym_46
    Joined: Sep 8, 2005
    Posts: 3,987

    plym_46
    Member
    from central NY

    Just checked. The threads on the ac45 are 1/8 inch short of the thread depth of the head. The electrode is fully inside the threads, no projection into the combustion chamber. So you are going to need to hunt up some plugs unless somebody can pitch in what they are running. My experience with the head is from 15 years ago and I can't remember what I found, although 80 is ringing a bell.
     
  26. Garpo
    Joined: Jul 16, 2016
    Posts: 194

    Garpo

    A lot of Edmunds heads run 1/2" reach plugs.- AC45F or 43F Champ L90, L86, L78I I prefer to start a stage or two cold and see where it colours up best. A step at a time.
    Some Edmunds heads have plug located just clear of the valves, which gives the option of an extended nose plug.
     
  27. dwollam
    Joined: Oct 22, 2012
    Posts: 1,086

    dwollam
    Member

    Man, I really envy you getting that head now! My neighbor just gives boxes of odd length and types of screws! He is also the person that stocks the nuts, bolts and washers etc at Ace. His son in law gives him tons of that stuff when they switch brands or lines. I just can't bring myself to bum stuff from him at home vs buying it where he, his son, and 2 grand kids work. The Grand daughter lives behind us.

    Dave
     

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