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Technical Leaf spring bracket on frame cracked

Discussion in 'Traditional Hot Rods' started by zz29, Jun 9, 2018.

  1. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    IMG_3725.jpg IMG_3724.jpg

    As you can see in these pics, the bracket that holds the driver side leaf spring is cracking. What kind of shop would fix something like this? We are taking care of this car, we can’t do the work ourselves. A regular mechanic? A body shop? I’m in Rhode Island. Thanks


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  2. Budget36
    Joined: Nov 29, 2014
    Posts: 13,275

    Budget36
    Member

    Find a good welding shop, then body shop for repaint.

    Or a good hotrod shop that does everything.
     
    zz29 likes this.
  3. sloppy jalopies
    Joined: Jun 29, 2015
    Posts: 5,256

    sloppy jalopies
    Member

    IMO... any reputable rodder should be able to get it ready [prep it] and have a WELDER come over and nuke it !
    might not have had enough bevel ground into the surfaces before, check the back/inside of the xmember... or some guys grind away weld for smooth looks...
     
  4. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,451

    Boneyard51
    Member

    Here in Oklahoma there are a lot of mobile pipeline welders all over the place. They are always willing to do a small job like that after hours for extra cash. Would be child’s play for one of those certified welders.

    Don’t just repair that crack!! Reweld both sides of the spring and both sides of the frame. If this weld broke the others are on their way to cracking. Be safe

    Bones
     
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  5. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,214

    mgtstumpy
    Member

    It will crack again, eventually; most likely on both sides and both frame rails. I would add some simple triangulated gussets that spread the load up the sides of frame rails from the bottom edge where it is cracked. Safety is paramount.
     
  6. The37Kid
    Joined: Apr 30, 2004
    Posts: 30,797

    The37Kid
    Member

    Look at the thickness of that plate and the thickness of the frame rail, it was designed to crack. Bob
     
  7. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    Yeah, I was thinking the same thing. Thanks for the advice.


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  8. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    Hmm. So rewelding may only fix the issue temporarily. Thanks.


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  9. lostone
    Joined: Oct 13, 2013
    Posts: 2,890

    lostone
    Member
    from kansas

    I agree, I'd reinforce it too. Also agree it will just crack again if you don't.
     
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  10. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    Seems to be the consensus.


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  11. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,451

    Boneyard51
    Member

    While I not against gussetting it for extra strength, wether it will crack again with out gussets depends where it cracked. If the weld pulled the metal of the tubing out and cracked, yes, you would need more reinforcement. But after cleaning the bondo and paint off and you find the the weld cracked, just putting a proper weld would be ok. Always analyze the failure before doing the repair.

    Bones
     
  12. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    Thanks Bones. I will take it to an experienced welder that work on hot rods or old vehicles.


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  13. Marty Strode
    Joined: Apr 28, 2011
    Posts: 8,922

    Marty Strode
    Member

    Look at the gusset on the steering box mount. A simple wedge cut piece of round tube, fully welded. I can't zoom up and crop the picture, but if anyone can, please do. IMG_5977.JPG
     
  14. alanp561
    Joined: Oct 1, 2017
    Posts: 4,647

    alanp561
    ALLIANCE MEMBER

    I agree with Bones and The37Kid. "Always analyze the failure before doing the repair". If you look closely at the start of the crack at the bottom, the fitting was never beveled. Then someone ground away most of the weld in the interest of "appearance" and set the whole thing up to crack. If that is any indication of the welding on the car, every weld is suspect.
     
    gimpyshotrods likes this.
  15. Strip the paint off, top and bottom, both sides.
    See what you really have.
     
  16. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,993

    Mr48chev
    ALLIANCE MEMBER

    spring mount on blue roadster..jpg

    Eyeballing that closely after saving and expanding the photo it looks like it ripped the tubing of the frame and it looks like it has been cracked for quite a while.
    That whole setup is pretty sketchy as all you have holding the front end up is a few welds along the frame that is pretty thin in it;s own right. You for sure need the gussets inside and out that MgtStumpy suggested if not a whole redesign of the mounts.
     
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  17. Engine man
    Joined: Jan 30, 2011
    Posts: 3,480

    Engine man
    Member
    from Wisconsin

    It appears that the plate was notched into the frame which looks very thin and rusty.
     
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  18. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,078

    1946caddy
    Member
    from washington

    Looks to me like they used 1/2" material to make the bracket and welded it to a 10 or 11 ga. tube frame. They then proceeded to grind off most of the weld to make it look pretty. The other problem with this front end design is the spring twists when you hit a pothole. The simplest way to fix it would be to clean it up real good and re weld it and then put a doubler plat from the bracket up the side of the frame and weld it to the frame. Notice how the plate spreads the stress over a larger area in the picture of the bones connection. 10419429_845972935439302_4139013519247995110_n_zpsd1eutzpd.jpg
     
  19. gimpyshotrods
    Joined: May 20, 2009
    Posts: 23,334

    gimpyshotrods
    ALLIANCE MEMBER

    ^^^THIS!^^^
     
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  20. Closer inspection of all welds relative then go with the better welds and don't grind them down. Consider a panhard rod, right now the limiting point from the axle moving side to side is broken. A panhard bar will stop that. Your spring is doing more than moving up and down as it is now.
     
  21. ROADSTER1927
    Joined: Feb 14, 2009
    Posts: 3,144

    ROADSTER1927
    Member

    You could clean it and weld it up and run u bolts on top of the frame. But a gusset would be the cleanest.
     
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  22. Parallel leafs do not need a panhard bar, it will create a bind.
     
  23. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    [​IMG][​IMG][​IMG]

    Update: the guy we take the cars too didnt think the crack was anything g to worry about because the way the car is setup, but he would weld it if it made us feel better, so we had him do it. I got some automotive primer from Speedway and then happened to find a Krylon matte finish blue at Lowes that was a dead exact match for the powder coated frame (I assume it’s powder coated). It’s now pretty much invisible from 6 ft away, not up close. Thanks for the advice


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  24. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,993

    Mr48chev
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    That looks a whole lot stronger than what hadn't been ground off the original welds.
     
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  25. jhexide
    Joined: Feb 23, 2012
    Posts: 334

    jhexide
    ALLIANCE MEMBER

    i wonder what the other side of that frame rail looks like ,it may be cracked as well...
     
    Unkl Ian likes this.
  26. What does the inside of the bracket look like ?
     
  27. While I agree the new weld is much better than original, it really would be good to have a doubler plate to help distribute the forces into more of the frame wall and over a longer distance.

    If you think about the forces, the back end of the weld is in tension (mostly, some shear also) and that is why it cracked in the first place; combined with a poor weld that obviously contributed to the minimal strength. The thin frame wall is still present, whereas a doubler would help to reinforce that area. Too late now unless you want to grind it out and redo the repair. Oh well, there is always the next time if/when it cracks again.
     
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  28. zz29
    Joined: Sep 7, 2017
    Posts: 258

    zz29
    Member

    The other side looks fine and the inside part of the bracket are fine as well.


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  29. Tim
    Joined: Mar 2, 2001
    Posts: 17,220

    Tim
    Member
    from KCMO

    I’m curious if when your cleaned it off if what most of what we saw in the original photo was cracked and popped bondo and paint,not an open tear in the metal.
     
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  30. Tim
    Joined: Mar 2, 2001
    Posts: 17,220

    Tim
    Member
    from KCMO

    @Marty Strode

    Lightened it up and drew over it to make it easier to see
    A6EEEB16-864B-49FF-961E-C5A3A9E08B03.jpeg

    After posting this I can see easier ways of cutting it out but it’s the first way that popped into my head so that’s what I drew
     

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