Looking for hell hole welding advice |
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Looking for hell hole welding advice |
AndrewBlyholder |
Aug 15 2020, 12:36 PM
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#1
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Member Group: Members Posts: 109 Joined: 20-September 04 From: Richmond, CA Member No.: 2,791 |
Launching in my hell hole rust repair. Need some advice on the usual welding technique for patching.
Many of the patch parts have flanges that match the factory stampings. I assume the factory spot welded these things together. Is that correct? Don't have a spot welder, and probably couldn't reach most of these locations if I did. What's the usual technique then? Drill holes in the flanges and fill with rosette welds? Or just weld the edges of the flanges? I'm replacing some sections of the main longitudinal tubes under the battery. That tube was a double walled on both the inside and outside faces. The replacement panel I have from AA has the double wall spot welded onto it. But how do I go about getting both panels weld together at the butt joint where the patch meets the original? Grind/cut the outer face back a little bit more than the inner panel, weld the inner first, and then weld up the outer? Battery tray replacement questions: - The lower support has three flanges on it. The front and side flange are easily accessible for welding, but the rear flange is turned inward. Do you weld that one too or leave it unwelded? What did the factory do there? - The easy way to attach the battery tray to the support would be to weld them together first. Is that recommended? But if you do that, then there would be no way to weld the inward turned rear flange of the support. Thanks for any and all suggestions. Andrew Blyholder |
AndrewBlyholder |
Aug 21 2020, 10:37 AM
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#2
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Member Group: Members Posts: 109 Joined: 20-September 04 From: Richmond, CA Member No.: 2,791 |
More progress:
20 years ago, I totaled my previous street 914 in a front end accident (beware geriatric doctors in Cadillacs!) Put a deep vee in the nose that wrinkled everything back to the windshield posts. Let the insurance co. total the car, but bought the chassis back to strip it for parts. Cut up and tossed the bend chassis, but.... I did save the two back quarter panels thinking they might be useful for rust repair someday. Well, that day has come! The top size of the longitudinal was pretty rust pitted, but the bottom side was still pretty good. Here's the piece I cut out: Welded up all the holes I had to put into it to drill out the spot welds: Then made a cardborad template: Transferred the template to the part and cut it out (leaving about 1/8" extra all around.) My donor rear quarter was just a few inches short of where the rust ran to on the floor plan, so I had to fabricate and weld on an extension at the end: Here it is all nicely painted with weld-thru cold galzanizing paint: And finally, the patch fit into the hole: Today I'll start welding it back in! Andrew |
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