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Replacing the front pan, which welds to drill out
Need to replace a bunch of panels in our '67 912 and Im planning to use a spotweld bit/saw to drill out the welds but I've got some questions first:
1.) Do I drill holes in the bad panel and grind off the excess from the good panel, or vice versa? 2.) How do I attach the new panels? Do I need to get my hands on a spotwelder? I've got a good MIG... My initial idea was to drill out the welds leaving holes in the good panels, place in the new panels and then attach by filling the holes with MIG welds. If I instead drill out the bad panel and grind off the weld from the good panel how would I attach the new ones into place? Best, mm
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'75 911S 3.0L '75 914 3.2 Honda J '67 912R-STi '05 Cayenne Turbo '99 LR Disco 2, gone but not forgotten |
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03-10-2010, 10:06 AM
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Capitalist and Patriot
Join Date: Sep 2006
Location: Freedomville
Posts: 1,923
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Contact (PM) KevinP73 here...He is 'the man' on early 911/912 sheet metal...
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Former Test driver & Production Manager Singer Vehicle Design 2009 Cayenne GTS, '81 911SC RoW Targa (lot's of goodies), '86 535csi, '84 633 csi (turbo charged-sold)  , '68 912 Targa (sold)  , '69 911E (sold) "Dream it, Believe it, Decide it, DO it " |
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03-10-2010, 10:43 AM
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Join Date: Jan 2005
Location: cooperstown NY
Posts: 894
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if possible drill on bad panel and grind off residual from good.
then on re-assembly punch or drill small holes about 3/8" for your plug welds. stay away from edges. the problem with spot weld cutters is the hole they make is big. it takes a lot to fill them, so more work grinding them down. and if you're close to an edge they will burn the edge away, looks sloppy.
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bob 1972 E pos correction: expensive pos someday.... "shut up and drive!" |
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03-10-2010, 06:22 PM
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1.367m later
Join Date: Feb 2002
Location: small farm town Iowa..........at last
Posts: 6,357
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You have to consider how easy it is to access an area whether your drilling, welding or grinding. I prefer to drill out the bad panel and clean the good part. This means I have to drill holes in the replacement part but you can drill smaller holes that require less weld to fill. This is a little more work but the end result is a lot cleaner. Having a good spot welder or access to one is a big help.
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non velox ad propitiare, verisimile non oblivisci If it's not The Original Automotive Innovations and Restoration, then it's just hot AIR. |
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03-10-2010, 06:44 PM
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Helga
1975 Porsche 914
