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Originally Posted by hawkcharmer
How does one achieve welding the inner plating fully in place?
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You cut sections out and weld them back in.
I have held plates with self tapping screws and C Clamps.
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Is the bottom section of frame doubled up 1/8” plate?
This seems to be where most of the support is.
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You can a lot of times, it in the better sections. I cut the bottom out and
then cut weld windows in the sides to weld the plates in. It seems to be easier though to cut the inner frame well out and then weld the plates in. Then reseal the inner frame rail. As I have done them both ways.
You have to slice with either cutting torches, cutting wheels or a plasma cutter.
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Should I cut out bad sections, back plate the cut out sections on inside of frame and then butt weld plate in specific section I cut out?
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You can I do that a lot of the times. I just did that on tetanus 1. Except I skipped the but plate on the section I cut out.
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Or cut out bad section, butt weld in new plate and then another plate over that section?
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You can if you wish. Its entirely up to you. :-)
Our rear lower control arms are nortious for coming off the frame.
So you really have 2 options:
Buy a saftey T plate and weld it on..
Or make your own plates to fix the issue.
As you have to fix 2 sections. You have to strengthen the frame
and you have to strength that control arm bracket.
If it were me, I would cut out the inside of the arch. Then clean it all out and
assess the inside of the frame in that area. Clean it all take out the rust chunks etc.
Then weld a plate on the inside of the outer rail. Check and see how back the bottom of the frame is as mostly they are rotted out. You can plate it shut the bottom or leave it open so crap cant build up in that arch anymore.
Then weld a plate on the inside of the inner rail. I always burn through and weld the lower control arm bracket to both the outter rail and the inner rail. So its welded to all 3 pieces of steel securely. Then you can plate the outside to smooth it up and hide your repairs.
You notice that the outer C is on thickness of steel while the inner is thinner...Another reason why they rust out faster.
Then you can plate over the lower control bracket to give it some strength back....Or you can cut it off and put on a non rusted one. Its harder to put the plate in the inner bracket as you have to make sure you don't interfere with the bolt area of the lower control arm.
I have one frame that someone did all external plating on before I got a hold of it. I plan to leave it alone and they outer plated both of those lower control arm brackets. So I can probably send you pictures of how they did it. :-)
Is it just the sides of that lower control arm bracket with holes in it? As you can outer plate it or inner plate that bracket. Its not as critical as the water and crap just fall out. Inside of laying inside the frame rusting it out. :-)
Then make sure you after all the welding down that you super coat the inside of the frame with rust inhibiting solutions like Fluid Flim, Transmssion fuild etc. Then paint the outside of the frame over those areas as they will rust especially where you welded.
Hope this helps.