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Best Ways to fix Firewall Holes?

Discussion in 'The Hokey Ass Message Board' started by vintageauto, May 11, 2013.

  1. Hi All,

    Time to address my Firewall and the existing holes that need to be repaired.
    The 2 pics below show what I need to do. Mine, with all the holes and the other, repaired and painted. So, I'm looking for the best and/or creative solutions.
    My thoughts were to Mig weld the small holes while backing them up with a piece of copper. Making a few patches for the couple of larger holes, then Mig. Any other ideas would be appreciated.


    Attached Files:

  2. chevyfordman
    Joined: Oct 4, 2008
    Posts: 987


    You have the right idea, I just prefer to tig weld the patches in and then hammer the weld, it grinds off nice and flush. good luck
  3. Belchfire8
    Joined: Sep 18, 2005
    Posts: 1,542


    That's how I did mine....all 86 of them!
  4. to a fellow Marylander, cut patches, weld, grind...repeat

  5. F-6Garagerat
    Joined: Apr 12, 2008
    Posts: 2,652


    Doesn't Bob Drake sell a assortment pack of round metal discs for patching holes? I thought I saw them on his site.
  6. 1971BB427
    Joined: Mar 6, 2010
    Posts: 6,539

    from Oregon

    I don't own a TIG, so I MIG welded all mine in. Used the copper or aaluminum backer for the 1/4" and smaller holes, and fillers for larger.
  7. pitman
    Joined: May 14, 2006
    Posts: 5,037


    I'd do the same using oxy-acet. use steel wire and needs almost no filling.
    Grinds back easily too.
  8. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,168


    Knock-outs from old electrical boxes
  9. now is a good time to weld some studs to the inside of the firewall to mount stuff like AC and a fuse panel , etc.
  10. 32v
    Joined: May 20, 2007
    Posts: 952

    from v.i.

    I use nails ,gives you a handle to position it then grind em off
  11. mashed
    Joined: Oct 15, 2011
    Posts: 1,474

    from 4077th

    Move around a lot and keep the heat down.
  12. Me too. Grinding sucks!
  13. Roger Walling
    Joined: Sep 26, 2010
    Posts: 1,146

    Roger Walling

    Back in the days when chrome was cheap, :D I made a piece of 16ga. the shape or the firewall and had it chromed. :cool:

    Attached Files:

  14. What a great idea.


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