41 00... Opening Welded Connections

WARNING: This page is about a different car, the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2006 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

Opening weld spots (resistance pressure spot welding):
- 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.
Opening MAG weld seams and MIG brazing seams:
- Procedure:
  Grind off weld seams with a belt or angle grinder. Do not grind the base material thin.
  
  Use a chisel to separate the sheet metal flange and remove the component.
Opening laser weld seams:
Laser weld seams are used in the roof outer skin area.
- Procedure:
  Roughly cut roof outer skin in the roof channel to improve accessibility.
  
  Place angle grinder with grinding disc on laser weld seam and grind through top panel. Be careful not to cut through and damage panel underneath.
  
  Remove sheet metal flange.