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.
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HOMESERVICE MANUALSBMW2013128I 2D CONVERTIBLE, ENG CD N52, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2432 (COLLISION - BODY PANEL REPAIR (F12) CONVERTIBLE)BODY REPAIR GENERAL INFORMATION41 00... SPOT-WELD BONDING STEEL COMPONENTS
2013 BMW 128i 2D Convertible, Eng CD N52, Standard Trans
41 00... Spot-Weld Bonding Steel Components
2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 41 00... Spot-Weld Bonding Steel Components
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Comply with the following topics from "BODY, GENERAL
":
Safety regulations. See 41 00... SAFETY AT WORK , 41 00... HANDLING ELECTRICAL SYSTEM AND ELECTRONICS , 41 00... HANDLING AIRBAGS AND RESTRAINT SYSTEMS and 41 00... WELDING STEEL COMPONENTS .
Safety regulations. See 41 00... SAFETY AT WORK , 41 00... HANDLING ELECTRICAL SYSTEM AND ELECTRONICS , 41 00... HANDLING AIRBAGS AND RESTRAINT SYSTEMS and 41 00... WELDING STEEL COMPONENTS .
- Beginning with E65 the spot-weld bonding process is used to increase vehicle rigidity. In partial body areas, a 1-component adhesive is applied to the spot flanges and this is followed by resistance pressure spot welding. The adhesive is hardened only after the paint drying process (at approx. 180°C).
- In the case of repairs, adhesive is not applied to the spot flanges. The number of welding spots is doubled as a substitute for the omitted adhesive.
- Minimum distance between welding spots (1) is 25 mm. Important! The minimum distance must not be undershot! If there is not enough space for twice the number of resistance weld points, each non-made resistance weld point must be replaced by a MAG weld seam (2). Length of a MAG weld seam = 20 mm. Set the MAG weld seams at equal intervals distributed on the face.
- The following procedures are used as a substitute for spot-weld bonding:
- MAG welding (M etal A ctive G as welding)
- Resistance pressure spot welding (referred to in the following and in the repair instructions as spot welding).
- Adhesive is not applied between the spot flanges on new parts in the case of 2- or multi-sheet joints. Areas which cannot be reached by the spot-welding tongs can be joined by MAG plug welding. The number of welding spots is doubled as a substitute for the omitted adhesive.
- Exceptions (e.g. E65) are described in the relevant repair instructions. Apply welding spots to existing welding spots on new part. This is necessary because the adhesive between the spot flanges of the new part acts as an insulator.
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CAUTION: Extract smoke and fumes during welding work.
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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.