1 Series 125i (N52K) Convertible
2. Work materials
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Gas brazing:
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Tube pack and torch (gas torch)
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Brazing solder
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Gas bottles (oxygen and acetylene)
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Welding goggles
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Tinning:
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Tube pack and torch (torch for tinning)
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Tinning paste
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Tin (refer to "Electronic Parts Catalogue" ETK).
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Gas bottle (acetylene)
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Protective goggles
3. Preparations for brazing/tinning
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Heat brazed joints to be opened with an autogenous flame. Lift off remaining metal and remove remaining brazing
solder with a wire brush.
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Remove the paint and zinc coating in an area of approx. 30 mm around the seam to be soldered.
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Remove the paint and zinc coating in the tin-plating area and approx. 30 mm beyond.
4. Brazing/tinning
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Execute brazed seam without overheating the solder and with low heat dissipation. If necessary, use heat
protecting paste.
5. Subsequent treatment of brazed joints:
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Remove burnt residual zinc completely. Straighten, grind and tin visible connection points.
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Remove burnt paint with a stainless steel wire brush.
RA Welding and soldering steel parts
BMW AG - TIS
17.01.2013 10:39
Issue status (12/2007) Valid only until next DVD is issued
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