Opening Weld Spots (Resistance Pressure Spot Welding): Procedure
If necessary, surface-grind existing unevenness with a belt or angle grinder in the area around the weld spot.
Set punch mark in center of weld spot. Set 8 mm dia. weld spot drill bit on punch mark and drill through top metal sheet.
NOTE:
Because the weld spots may have surface-hardened, grind them if necessary with an angle grinder and paper grinding disk.
Use a chisel to separate the sheet metal flange and remove the component.
Follow the special procedure for, see SPOT WELDS .