obrut Posted November 20, 2020 Report Share Posted November 20, 2020 I started working on my 72 510 again and I want to repair the rust in the front frame extension that is down by where the front bumper mounts. I started to cut just through the first layer. I pealed it back and saw that there is a second piece that runs on an angle and looks like a reinforcement for the front bumper mount. I've searched for pictures but can't seem to anything on this spot for repair. Anyone have pics or suggestions for repair in this area? Quote Link to comment
Draker Posted November 20, 2020 Report Share Posted November 20, 2020 How is the inside frame rail? Just as crusty? If it were me, I'd chop out all that metal and get a good look at the inside. If the rust is isolated to the outside sheetmetal, I'd just make a replacement part and weld it in. Same goes for the inside piece, although that might be a bit easier if you could find a donor frame rail. It can be fabricated though. Do you have a welder, a cutoff disk, and a spot weld cutter? Quote Link to comment
obrut Posted November 20, 2020 Author Report Share Posted November 20, 2020 Inside frame rail is super clean, both front sides are like this but seems weird to me considering how clean everything else really is. I do have a welder, cutoff disk and a spot weld cutter and have fix/patch stuff before. Just reading and searching before cutting it open. 1 Quote Link to comment
Draker Posted November 20, 2020 Report Share Posted November 20, 2020 Good to hear your've got the tools and experience. I'd just start chopping and never look back. 🙂 Just make sure the actual rail is good, otherwise it gets a little tricky. Make sure the sway bar mount is solid and the tension rod pocket is good. If it's just the wheel well tub down to the frame rail, I'd just start removing all of that then get a good look inside and go from there. I bought a cheap ebay bore scope to look inside areas like this. 1 Quote Link to comment
obrut Posted November 20, 2020 Author Report Share Posted November 20, 2020 I have a bore scope... good idea I'll do some work on it this weekend and snap a few pictures, thanks. 2 Quote Link to comment
Icehouse Posted November 20, 2020 Report Share Posted November 20, 2020 This is what I did. Just chopped it all out. Since it was rusting from the inside and outside. Quote Link to comment
Draker Posted November 20, 2020 Report Share Posted November 20, 2020 Good as new! ^^ Quote Link to comment
obrut Posted November 20, 2020 Author Report Share Posted November 20, 2020 Looks good, did you weld in thicker metal or is the inside layer in there? I cut the outside piece off. I want to fix/replace the inside piece and then add the outside piece. Quote Link to comment
obrut Posted November 20, 2020 Author Report Share Posted November 20, 2020 Another pic Quote Link to comment
yenpit Posted November 20, 2020 Report Share Posted November 20, 2020 It's a common area to rust, cuz sandwiched metal with no sealer etc on the inside. Once you patch it up, figure out a way to soak the inner cavity with paint or a rust inhibitor! KlassicFab JDM (kfvintagejdm.com) is currently releasing more & more patch panels for the 510's. His website is NOT current, but there is stuff listed. He usually advertises on the various Facebook Datsun pages. He hasn't really considered this particular panel, however he will now. For production, he 3D scans, creates the tooling & STAMPS his panels (go to KlassicFab.......not JDM......to see all of his air cooled VW panels!). Pre-production, he has HAND FORMED a number of Z car panels for us & they are really nicely done. Best example was the 70-78 Z lower front fender patch.............the current Tabco produced panel, sold by all of the Z specialists, is horrible, so he had his guys hand form two pairs for us & they were MILES better than the Tabco crap! He is currently creating the tooling on these, so will have available soon. I believe he has already released the 510 lower front fender panels. Bottom line, he said he could hand make some of these 510 frame rail panels for you if you would like! Give Gerson a call at 561-747-4800 or send him an email sales@klassicfab.com! TJ Denver CO Quote Link to comment
obrut Posted November 21, 2020 Author Report Share Posted November 21, 2020 Yenpit thanks for the contact, if I can't make these patches I will definitely reach out to him for some. A few more pictures The piece with the nut is the piece sandwich in the middle. Quote Link to comment
obrut Posted November 21, 2020 Author Report Share Posted November 21, 2020 (edited) Peeling back more Edited November 21, 2020 by obrut Quote Link to comment
Draker Posted November 21, 2020 Report Share Posted November 21, 2020 Looking a little toasted, but fixable Quote Link to comment
obrut Posted November 24, 2020 Author Report Share Posted November 24, 2020 Didnt want to have to take the lower valance off but it needs to be done to do it right. Quote Link to comment
obrut Posted November 24, 2020 Author Report Share Posted November 24, 2020 Here is the pictures I think I would have wanted to see before cutting it open. All three layers, I cut and removed carefully so I didn't cut the good metal underneath. 1 Quote Link to comment
obrut Posted November 24, 2020 Author Report Share Posted November 24, 2020 One last note the sheet metal on the outside is 1 mm thick and the second layer the runs on a diagonal with the welded on nuts for the bumper is 1.85mm thick. 2 Quote Link to comment
Draker Posted November 25, 2020 Report Share Posted November 25, 2020 (edited) thanks for posting the details. I think most of the Datsun sheet metal is 1mm. That looking mighty clean inside! Great to see. Edited November 25, 2020 by Draker Quote Link to comment
4perrev Posted November 26, 2020 Report Share Posted November 26, 2020 Yep, same thing here: It was ugly, but now she's fixed. I didn't post a ground down picture though. Good work! 1 Quote Link to comment
Aaron Datsun Posted November 27, 2020 Report Share Posted November 27, 2020 I went though this too. Quote Link to comment
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