Looking for hell hole welding advice |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Looking for hell hole welding advice |
AndrewBlyholder |
Aug 15 2020, 12:36 PM
Post
#1
|
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 |
IronHillRestorations |
Aug 21 2020, 04:53 PM
Post
#2
|
I. I. R. C. Group: Members Posts: 6,719 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None |
Looking good! I was concerned about the cracked inner mount, but it looks like you've changed course and headed in the right direction.
Cold galvanizing paint welds through very poorly. I'd suggest scratching or sanding off where you've got to weld. You don't want to breathe the zinc fumes it puts off either, it's bad news. I've used several brands and if you want to use weld through primer, UPol is the best. I still scratch off where I'm going to weld though, it makes it easier to strike an arc, especially if the metal has any thin spots. I'd suggest making some strategically placed holes and going back over your enclosed box sections with Eastwood's internal frame coating Eastwood Internal Frame coating I used a piece of welding rod (that I bent as needed) and taped the spray tube to it, to get in the box sections. Be sure and get their pre paint prep, you use it for purging the spray tube and nozzle. pre paint prep spray Of course it's a good product for prep cleaning. I did a total chassis (on a rotisserie) and it took about a dozen cans to do the whole car really good. |
Lo-Fi Version | Time is now: 21st May 2024 - 11:25 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |