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Technical Dent repair advice needed.

Discussion in 'The Hokey Ass Message Board' started by Driver50x, Nov 16, 2022.

  1. Driver50x
    Joined: May 5, 2014
    Posts: 431

    Driver50x
    Member

    I’m trying to figure out the best way to repair this rear quarter panel on my 1947 Chevy. I have very little dent repair experience, but I’m willing to learn. I tried doing some hammer and dolly work on the front fender of this same car. I found that either the sheet metal on this car is very thick and strong, or I am very weak. :rolleyes:
    I can access the backside of this panel from the bottom, but there is only about 2 to 6 inches of clearance behind the dent. I’m think about maybe drilling holes in it and pulling the dent out with a slide hammer. Do you guys have any better suggestions? 911DC724-BA27-418F-B089-ED40A33A2147.jpeg DBBB65A1-CAA1-4436-809E-C8B69897ABFA.jpeg 07AC40FD-535F-4BFF-8039-59AAC5F8EB96.jpeg 9E45424B-3B21-40D2-8A99-26C2D32F0DDA.jpeg D0E0C966-04C5-449F-A35C-3A41CCDE057A.jpeg

    ps. I blacked out the non hamb friendly wheels. They will be gone soon anyway.
     

    Attached Files:

  2. you need to remove that fender to fix it, but I see it's molded to the body somehow.
    easiest is to remove and replace with a good one, I have several for sale
     
    tractorguy, lippy and Driver50x like this.
  3. You could try to weld studs on and pull the dent out.
     
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  4. Wanderlust
    Joined: Oct 27, 2019
    Posts: 796

    Wanderlust

    It looks to me that you may have rust in the fender seam already, I would clean the paint and filler from that seam and see about removeing that fender, hopefully it’s not been welded to the car.
     
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  5. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,998

    Hollywood-East
    Member

    You need a porta-power, Some small blocks of wood an a handful of patience, Absolutely do not drill holes,
    Once you get it pushed back to close, Then... Start the finesse with hammer/dolly.. You might surprise Your self!
     
  6. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,998

    Hollywood-East
    Member

    Start with a 4" Chunk of 2x4, pushing off frame, Starting at the rear, an work forward,
    Easy does it. Don't try to take the whole dent out in one push..
     
  7. harpo1313
    Joined: Jan 4, 2008
    Posts: 2,586

    harpo1313
    Member
    from wareham,ma

    One of those air bag tools would do it.
     
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  8. Driver50x
    Joined: May 5, 2014
    Posts: 431

    Driver50x
    Member

    I out on the road now, but I think I’ll take a closer look at doing this when I get back home. This car is going to be a low budget daily driver, it doesn’t need to be perfect. My buddy has a porta-power I can borrow. If that doesn’t work out, I’ll look at removing the fender. Thanks.
     
  9. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,850

    49ratfink
    Member
    from California

    most people will put more dents in the parts that are not stretched in a effort to fix the dent. the blue squiggle part should not be touched, the metal wants to spring back to normal in that area as soon as you remove the stress caused by the stretched part which I colored green.

    911DC724-BA27-418F-B089-ED40A33A2147.jpeg



    I'd start by pushing from the inside where the purple X is.. maybe use a bottle jack with a rounded wood block on the end so you don't make a new dent. your worst part in the lower green line. that is stretched pretty good.

    that should put it much closer to correct than it is now. what sort of access you have on the inside would determine the next part. I think the damage would be minimal on the upper green line part.

    push and prod it back to shape, then some hammer and dolly on the stretched parts. I always say go into something like this with the intention of using no bondo and you results will be better than if you start it with a can sitting next to you. I'm no pro and my stuff does not always come out perfect without a bit of mud but I have read "the Guide to Metal Bumping" book (written in the 40's) several times and watched a bunch of videos of people who know what they are doing.

    that guy who invented the shrinking disc "Sunchaser Tools" at one time had some great videos on VHS!! I'm sure there are new ones out now but the rules have not changed. old metal is still the same.

    that dent is not as bad as it looks.

    D0E0C966-04C5-449F-A35C-3A41CCDE057A.jpeg
     
  10. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,850

    49ratfink
    Member
    from California

    think positive and your results will be better.
     
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  11. Jack it up. Remove the tire. Set car on jack stand
    Wedge a screw or scissor jack and start pushing it out
    Or the already mentioned 2X4 as a leverage bar.
    Then start hammering.
     
    Last edited: Nov 17, 2022
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  12. lippy
    Joined: Sep 27, 2006
    Posts: 6,826

    lippy
    Member
    from Ks

    The dent will come out but what will you do about the welded, moulded fender? I see your in a pickle. I'm with rusty, replace the fender but you will have to re-weld it and re-mould it to the body. I may be wrong but when you push it out, you will crack the filler above the area that is damaged. I've been wrong before. Lippy
     
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  13. Hollywood-East
    Joined: Mar 13, 2008
    Posts: 1,998

    Hollywood-East
    Member

    Rite-On..
    You said the Key word, Driver...
    You go to take that fender off it's gonna get ugly would be my bet!
    49 above gave you, A Great Fisher Price way to approach it...
     
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  14. I used to work with a guy that had a dent like that, he inserted a half deflated basketball between the body and fender behind the dent then started to inflate the basketball. When the basketball put enough pressure on the dent he pounded on the crease (green area on 49ratfink pictures above) and then some more inflation, more pounding, etc. In about 20 minutes most of the dent was looking pretty good and the fender held the original shape pretty well. Hammer and dolly after that..... just a thought. Mark
     
  15. gimpyshotrods
    Joined: May 20, 2009
    Posts: 23,333

    gimpyshotrods
    ALLIANCE MEMBER

    I just came here to suggest that!

    It really does work. Just use a hand pump, for precise control!
     
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  16. 19Eddy30
    Joined: Mar 27, 2011
    Posts: 2,320

    19Eddy30
    Member
    from VA

    Like others have said , tricks & working the metal , the book is nice & easy understanding Guide, worth the purchase,
    ""The Guide to Metal Bumping ""
    or "" Bumping Metal""
    The copy I have has Martin Tool.
     
  17. '29 Gizmo
    Joined: Nov 6, 2022
    Posts: 802

    '29 Gizmo
    Member
    from UK

    I would get a pro to do it. With the right kit its a couple of hours work to get the shape back to a condition where you could skim it with filler. You could spend more than that on kit to do it yourself.
     
  18. alanp561
    Joined: Oct 1, 2017
    Posts: 4,647

    alanp561
    ALLIANCE MEMBER

    I think you mean, "The Key to Metal Bumping" by Frank T. Sargent, put out by Martin Tool & Forge. Just ordered one from Amazon.
     
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  19. Budget36
    Joined: Nov 29, 2014
    Posts: 13,275

    Budget36
    Member

    As mentioned, HF has stud welder kits. I bought one awhile back to get a dent out of my daughters car. Her dent wasn’t near as large, but I had no access to get a hammer on the inside to knock it out.
    but with some time and patience, you could keep bringing it out enough to get more access for a hammer.
    I think the HF kit was 79 or 89$.
     
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  20. Lone Star Mopar
    Joined: Nov 2, 2005
    Posts: 3,847

    Lone Star Mopar
    Member

    I got a copy of this book for Christmas years ago.. Its worth a look before you give it a start. Screenshot_20221117-074637_Amazon Shopping.jpg
     
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  21. Driver50x
    Joined: May 5, 2014
    Posts: 431

    Driver50x
    Member

    I appreciate the input, but I’m 55 years old and I’ve never hired anyone to do any work on any of my cars, other than the machine shop, transmission shop, and the lettering guy. I don’t plan on changing my ways now. Tools are a one time purchase, and I almost always end up using them multiple times.
     
  22. bigdog
    Joined: Oct 30, 2002
    Posts: 761

    bigdog
    ALLIANCE MEMBER

    Yep, and learning a new skill is never a bad thing. Sure, you might mess it up, but if you never make a mistake it just means you're not doing anything.
     
  23. Driver50x
    Joined: May 5, 2014
    Posts: 431

    Driver50x
    Member

  24. Wanderlust
    Joined: Oct 27, 2019
    Posts: 796

    Wanderlust

    Ok, granted trying to remove the fender will probably create more problems than you want for a daily driver
    What I would do is employ both a push and pull at the same time using the basketball as it’s cheap and durable, the stud guns an excellent tool, just get the gang clamp for pulling multiple studs. Park the vehicle next to a large tree, be sure to leave your self room to work, I’ve found a small chain hoist to have better control for pulling but a come along works too. Be aware the push acts in both directions, your going to want to back up the inner structure or you could create other problems , a couple sand bags against both inner sides of the trunk with a post wedged in between is cheap insurance.
    While you’re applying the push and pulling you want to be hammering the face of that hard fold at the rear of the fender, not too hard, work your way all along it, small steps will produce the better results. Prying works too just be sure to knock the corners off the 2x4, nobody wants more dents than they started with. Good luck
     
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  25. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,850

    49ratfink
    Member
    from California

    only a "pro" at a collision shop would need filler for that dent. a craftsman at an auto restoration shop would make it perfect with no filler needed.

    someone mentioned a stud welder. one could possibly come it handy at that bad stretch at the lower part, but you would not know until it is almost back in shape, it would not be the first tool from your toolbox.
     
  26. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,850

    49ratfink
    Member
    from California

    anyone who feels the need to do their own body work should buy this book. it was written 70 years ago when people did things right.

    Capture.JPG
     
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  27. 49ratfink
    Joined: Feb 8, 2004
    Posts: 18,850

    49ratfink
    Member
    from California

    I gave the Key to Metal Bumping approach.:)
     
  28. gimpyshotrods
    Joined: May 20, 2009
    Posts: 23,333

    gimpyshotrods
    ALLIANCE MEMBER

    You can totally do this.

    Start with the basketball method, and get the major distortion out.

    Once you do that, it will free-up space for a hammer and dolly.

    Take your time, and you will be fine.
     
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  29. 19Eddy30
    Joined: Mar 27, 2011
    Posts: 2,320

    19Eddy30
    Member
    from VA

    I remember in a interview Chip Foose gave, when Chip was young starting his dad brought Chip a fender that was dented up, Chip spent time repairing metal finishing, after showing to his dad, dad took a hammer / sledge & banged it up again & told Chip to repair again , I took it as a teaching corse .
     
  30. rdscotty
    Joined: Sep 24, 2008
    Posts: 253

    rdscotty
    Member
    from red deer

    This reminds me of when I took my pre employment autobody course back in 1979. Each student had an old body panel that the instructor would give some minor damage, and we would have to repair. After a few weeks, these panels were like our pets. One day he says we are going to have some fun. We each drew names out of a hat and got to take one swing with a pipe, at the person's panel. Everyone was having a great time trying to cause as much damage as possible. Once everyone was done, the instructor says "ok, now go fix the panel you just damaged"
     
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