41 00... Welding In Reinforcement Plate (Sheet Steel)

2013 BMW 128i 2D Convertible, Eng CD N52, Standard TransSECTION 41 00... Welding In Reinforcement Plate (Sheet Steel)
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In the case of a partial replacement piece, a body component is cut at a point described in the repair instructions.

A reinforcement plate is welded in to ensure sufficient strength.

Follow notes for 41 00... WELDING STEEL COMPONENTSΒ .

NOTE: The following graphics serve as general illustrations of reinforcement plate repair work. They are applicable to all sectional repairs.

Mark component in accordance with dimension A and cut.

Fig 1: Identifying Reinforcement Plate Dimension (Sheet Steel)
G09850104Courtesy of BMW OF NORTH AMERICA, INC.

Cut new part (1) in accordance with cut and if necessary adjust to fit with alignment bracket or universal mount.

Installation note:Β 

Maintain a distance of approximately one to no more than two material thicknesses at the severance cut to ensure welding with the reinforcement metal and enable more tolerant adjustment.

Fig 2: Identifying Reinforcement Plate Part (Sheet Steel)
G09850105Courtesy of BMW OF NORTH AMERICA, INC.

Clean inner and outer sides of connection faces (1) on new part and (2) on body.

Coat insides with welding primer.

Fig 3: Identifying Inner And Outer Sides Of Connection Faces
G09850106Courtesy of BMW OF NORTH AMERICA, INC.

Drill bore holes (1) and (2) at distance of 25 mm to each other.

Hole diameter approx. 8 mm.

Fig 4: Identifying Reinforcement Plate Bore Holes (Sheet Steel)
G09850107Courtesy of BMW OF NORTH AMERICA, INC.

Make reinforcement plate (1) from trim of new part.

If applicable, produce more reinforcement plates.

Length of reinforcement plates is min. 40 mm.

Coat reinforcement plates (1) and (2) on both sides with welding primer.

Fig 5: Identifying Reinforcement Plates
G09838554Courtesy of BMW OF NORTH AMERICA, INC.

Push reinforcement plate (1) into component on body up to half-way and plug-weld (3).

Fig 6: Identifying Reinforcement Plate And Plug-Weld
G09850109Courtesy of BMW OF NORTH AMERICA, INC.

If applicable, adjust the new part (1) with the alignment bracket or universal tool and plug-weld (2)

MAG weld the joint (3).

Grind and clean weld seam and plug weld spots.

Only visible areas of the outer skin and on the carrier support must be tinned.

All areas which have covers on the vehicle are not to be tinned.

Fig 7: Identifying Alignment Bracket/Universal Tool And Plug-Weld
G09838556Courtesy of BMW OF NORTH AMERICA, INC.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.