Mike_F Posted February 16, 2021 Share Posted February 16, 2021 I tried searching for this, but doesn't seem to have been asked yet. I have heard rumours that in Australia we have to lap weld floor pans, not butt weld - is this correct? If so, does anyone have a link to any standards for car restos, as there may be other things that one needs to consider when repairing a car? Cheers, Mike Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted February 16, 2021 Share Posted February 16, 2021 38 minutes ago, MikeFarkas said: I tried searching for this, but doesn't seem to have been asked yet. I have heard rumours that in Australia we have to lap weld floor pans, not butt weld - is this correct? If so, does anyone have a link to any standards for car restos, as there may be other things that one needs to consider when repairing a car? Cheers, Mike Completely false. It's an old panel beaters excuse they use because they can't weld and can't 'afford' the time to butt weld a panel in correctly. There's no AS for 'vehicle restoration' - feel free to look it up. Also repairs to a vehicle over 10 years old don't actually require an inspection or engineers report, unless significant chassis modifications have been made. I do however need to state this: unless you are competent welder and have some idea rust repairs, it's best left to professionals. 240ZBUILTBYME, mikedoeslife and Mike_F 2 1 Quote Link to comment Share on other sites More sharing options...
Mike_F Posted February 16, 2021 Author Share Posted February 16, 2021 Thanks Lurch. I had heard it only twice, but there was never any followup or specific details. Every other piece of advice said that "lap welds on floor pans will invite rust" - not what a Datsun needs more of. BTW - I've been looking back at some of your resto's that you documented here. Loving your work!! C.A.R. 1 Quote Link to comment Share on other sites More sharing options...
gilltech Posted February 16, 2021 Share Posted February 16, 2021 Lap welds will only invite rust if they are not fully sealed along both edges allowing moisture in. But do a butt weld if you can, single thickness is easier to dress up and finish so it is hidden. Quote Link to comment Share on other sites More sharing options...
240ZBUILTBYME Posted February 21, 2021 Share Posted February 21, 2021 On 2/16/2021 at 10:48 AM, C.A.F. said: Completely false. It's an old panel beaters excuse they use because they can't weld and can't 'afford' the time to butt weld a panel in correctly. There's no AS for 'vehicle restoration' - feel free to look it up. Also repairs to a vehicle over 10 years old don't actually require an inspection or engineers report, unless significant chassis modifications have been made. I do however need to state this: unless you are competent welder and have some idea rust repairs, it's best left to professionals. Hey Lurch and any other experts, the front and rear of the original floor pans had lapped joins from factory right? If you replace the floors on projects do you keep these lap joins or do you convert to butt welds? ryan Mike_F 1 Quote Link to comment Share on other sites More sharing options...
C.A.R. Posted February 21, 2021 Share Posted February 21, 2021 I leave them as the factory lap joints, however I prep them as best as possible with a generous application of weld through primer. Mike_F 1 Quote Link to comment Share on other sites More sharing options...
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