artishard116 Posted February 15, 2019 Share Posted February 15, 2019 I’m at the stage where I’m about to install bad dog rails and sfc’s on my 280z for stiffening purposes (original rails are fine). I’ve read every thread on the subject I can find but have found some conflicting info. I know the replacement rails can be installed over the existing ones, my question is does this create a potential trap for corrosion? Also when leaving the originals in place does it make more sense to drill drain holes in the new rails or try and make the whole thing airtight with seam sealer after welding? My tentative plan: 1. Blow out and shoot internal frame sealer in stock rails. 2. Clean the outside and mask off the weld areas and spray epoxy primer. Do the same for the interior of the new rails. 3. Fit new rails, weld, epoxy the outside, then seam seal. Any input appreciated, thanks. *Mods - I wasn’t sure if this should go in fabrication or paint and body, feel free to move. Quote Link to comment Share on other sites More sharing options...
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