Replacing Engine Support With Left Wheel Arch In Front Of Bulkhead (M4 Convertible)

Observe procedure of REPAIR STAGE 3 .

Read contents of BODY, GENERAL .

For stripping and rigging operations, refer to surrounding text on KSD CD (FRU number 41 11 071).

Spot-weld bonding is used on this vehicle. Observe specific PROCEDURE .

Use only an approved spot-welding apparatus for repairs!

Place vehicle on straightening bench.

Following new body parts are required (See applicable BMW Parts Catalog):

(1) Wheel arch, front
(2) Extension, wheel arch carrier support
Wheel arch carrier support shaped part

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Removal:

Mark severance cut (1) as pictured and cut.

LOOSEN spot-welded adhesive joints in areas (2).
(3) Position of cavity sealing.

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Open welded connections in area (1).

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Open welded connections in area (1).

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Open welded connections in area (1).

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Open welded connections in area (1).

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Mark severance cut (1) roughly as pictured and cut engine support.

Open welded connections in area (2) and remove engine support (3) with wheel arch.

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Open welded connections in areas (1) by grinding and remove residual section of engine support (2).

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Preparation of new part:

Mark and disconnect severance cut on the new part according to the severance cut on the vehicle + 20 mm added material (1).

(2) = Severance cut route on vehicle.

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Release welded connections and remove non-required components (1) from new part.

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Mark severance cut in accordance with dimension and cut.

Measurement a = approx. 145 mm from component edge.

Cut outer metal panel only.

Open welded connections in area (1).

Remove metal section (2).

NOTE: The metal section (2) is needed to close the engine support.

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Prepare REINFORCEMENT PLATE at severance cut.

Adjust new parts to fit with alignment bracket or universal mounting.

Prepare new parts in all joint areas for joining by welding.

Adjust carrier support extension new part.

Prepare new part in areas (1) and (2) for joining by welding.

In areas (2) follow procedure for replacing spot-welded adhesive joints.

Prepare new parts in all other joint areas for joining by welding.

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Installation:

Install new part with alignment bracket or universal mount and secure.

Weld new part in area (1).

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Weld new part in the areas (1) and (2).

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Install sheet metal section (1) and reinforcement plate and weld in areas (2) and (3).

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Weld new part in area (1).

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Weld new part in area (1).

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Weld new part in area (1).

Apply sealant to cavity sealing. Install cavity sealing (1).

Weld new part in areas (2) and (3).

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