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Technical Flathead help

Discussion in 'Traditional Hot Rods' started by 64ONEOFF, May 19, 2013.

  1. metalman
    Joined: Dec 30, 2006
    Posts: 3,297

    metalman
    Member

    Spray welding was the first thing I thought of when I saw the first post. I have a block that someone broke the edge off of an intake port, probably with a valve prybar. Guy I got the block from thought it was junk, little spray welding and it was good to go! I posted a thread on them fixing it a couple years ago.
     
  2. luke13
    Joined: Oct 25, 2013
    Posts: 381

    luke13
    Member

    talking to an old foundry worker the otherday an he pointed out something called thermal shock. where in a casting if you have a piece of block wall thats thick and that then thins out and back to thick again or just radical unneveness in wall thickness, cracks will usually appear on the thinner section as due to uneven temperature distribution with the thinner part getting hotter quicker and cooling more rapidly, this can happen after pouring whilst the block is cooling or can happen as its being used for day to day driving.I think with the origonal blocks cast in the 30s they used to let em sit an weather for sometime before machining em.
     
  3. 64ONEOFF
    Joined: Nov 30, 2011
    Posts: 378

    64ONEOFF
    Member
    from Md.

    Luke 13. The crack was at the thinnest part. I am good for now, but I am curious about the spray welding. I never heard of it....Taker easy fellas.
     
  4. aonemarine
    Joined: Nov 2, 2013
    Posts: 500

    aonemarine
    Member
    from Delaware

    My mill is out being mag-ed right now, I'm hoping to get a clean bill of health, but if it does have cracks and is something I can't pin myself, then ill have Joe spray weld it and I'll see if he will let me video him doing it.
     
  5. 64ONEOFF
    Joined: Nov 30, 2011
    Posts: 378

    64ONEOFF
    Member
    from Md.

    That would be awesome....Thanks man
     

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