What am I doing wrong? I cleaned the metal very well before welding, and tried different argon settings. I'm puzzled about what goes on after the bead is laid down that can create pinholes that often ...

The oil pan on our northern Illinois-based ’02 Ford F-250 4x4 had this problem. Oil was seeping from the bottom of the pan due to corrosion caused by 13 winters. It had actually been leaking for the ...