Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
41 00... Opening Weld Joints
- Opening weld spots (resistance pressure spot welding):
Sheet steel panels made from high - and super-high-strength materials make great demands on the tools used.
Only with special carbide milling cutters can weld spots be drilled out on these sheet panels.
Use BTR/BOR milling cutters only in conjunction with Vario Drill spot-weld remover. Sourcing reference for spot-weld remover and BTR/BOR milling cutters.
- Procedure:
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.
- Procedure:
- 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 metal sheet. Be careful not to cut through and damage sheet metal underneath. Remove sheet metal flange.
- Procedure:
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.