BMW 7 Series: Welding In Reinforcement Plate (Steel Plate)
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 welding steel parts.
NOTE: The following illustrations serve as general illustrations of reinforcement plate repair work. They are applicable to all cutting repairs.
Mark component in accordance with distance A and cut.
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Fig. 77: Identifying Component Cutting Distance
Cut new part (1) in accordance with cut and if necessary adjust to fit with straightening attachment or universal mount.
Installation: Adhere to a gap at severance cut of approx. one to max. two material thicknesses in order to ensure welding with the reinforcement plate and to facilitate a more tolerant fit.
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Fig. 78: Identifying Cut Position Of Part
Clean inner and outer sides of connecting areas (1) on new part and (2) on body.
Coat inner sides with welding primer.
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Fig. 79: Identifying Inner And Outer Sides Of Connecting Areas
Drill holes (1) and (2) at distance of 25 mm to each other.
Hole diameter approx. 8 mm.
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Fig. 80: Identifying Drill Holes
Make reinforcement plate (1) from trim of new part.
If necessary, make further reinforcement plates.
Length of reinforcement plates is min. 40 mm.
Coat reinforcement plates (1) and (2) on both sides with welding primer.
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Fig. 81: Identifying Reinforcement Plate
Push reinforcement plate (1) into component on body up to half way and plug-weld (3).
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Fig. 82: Pushing Reinforcement Plate Into Component On Body Up To Half Way
And Plug-Weld
If necessary, adjust new part (1) to fit with straightening attachment or universal mount and plug-weld (2).
MAG weld joint (3).
Grind and clean weld seam and plug weld spots.
Only visible areas of the outer skin and worn areas on the support carrier must be tinned.
All areas which have covers on the vehicle are not to be tinned.
NOTE: Only applicable within the European Union! European used-car regulations prohibit the use of tin containing lead in motor vehicles introduced after 01.07.2003!
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Fig. 83: Identifying Plug-Weld And MAG Weld J
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Welding Steel Components
IMPORTANT: Comply with the following topics from "Body, General":
Safety regulations.
Handling electrical/electronic equipment, airbags and restraint systems.
1. General information
The following p
Workshop Equipment
Minimum workshop equipment requirements in order to ensure the correct and
expert performance of body
repairs:
The tools listed below must be used.
All repair stages:
TOOL SPECIFICATION
Repair stage
SEE MORE:
Replacing Vacuum Hose For Brake Booster
IMPORTANT: Before beginning work, fully press the brake pedal several
times to reduce the
vacuum pressure in the brake booster. This makes it easier to remove the
vacuum hose.
Vacuum hose and non-return valve are welded together and are replaced
together as a single unit.
Necessary preliminary tas
Removing And Installing/Replacing Drive Unit For Backrest Angle Adjustment
Necessary preliminary tasks:
Remove DRIVER'S or PASSENGER seat.
Remove REAR PANEL ON FRONT SEAT BACKREST
Remove COVERS ON FRONT SEAT
If necessary, disengage backrest cover (1) on left and right in lower area
and lay outwards slightly.
Release screw (4).
Detach metal retaining ring (2) on lef
