Replacing A-Pillar With Reinforcement On Left (M4 Coupe)

Observe Procedure REPAIR STAGE 3 .

Read contents of BODY, GENERAL .

For stripping and rigging operations, refer to texts on KSD CD (job number 41 21 003).

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

Use only approved Spot-Welding Apparatus for repairs; See WORKSHOP EQUIPMENT (BMW AND MINI VEHICLES) .

Place vehicle on straightening bench.

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

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Following CONSUMABLES are required:

Material	Quantity
Blind rivet N1	1
Blind rivet N2	1

Removal

Fig 1: Front Pillar Component Location (M4 Coupe)

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Mark severance cuts in accordance with specified dimensions and cut.

IMPORTANT: Cut outer panel only for following severance cuts.

Dimension a = approx. 200 mm from corner of roof outer skin.

Dimension b = approx. 20 mm from center of a 20 mm dia. bore hole.

Open welded connections in areas (1).

OPEN spot-welded adhesive joints in area (2).

Release and remove A-pillar from cavity sealing (3).

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Undo welded connections in these areas (1) and remove the A-pillar reinforcement.

New part preparation

Mark severance cuts on new parts according to severance cuts on vehicle and sever.

Prepare REINFORCEMENT PLATES at severance cuts.

Adjust A-pillar to fit with alignment bracket or universal mount and secure.

NOTE: When adjusting, due to the absence of an outer skin, it is necessary to place a panel of equal thickness in the area of the door hinges.

In areas (1), set 2 bore holes 0 6.8 mm for blind rivets.

Remove new parts and deburr bore holes.

Installation

Apply sealant to cavity sealing.

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Install new A-pillar and reinforcement plates with alignment bracket or universal mount and fix.

When adjusting, the lack of outer skin means that a plate with the same thickness must be used as a shim in the area of the door hinges.

Rivet new part in areas (1) and (2).

Area (1): Blind rivet N1.

Area (2): Blind rivet N2.

Weld new part in further joint areas.

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Install and weld outer A-pillar and reinforcement plates.

NOTE:

Vehicles with slide/tilt sunroof: Make sure water drain hose (1) is correctly installed (watertightness).

In vehicle with a normal roof, a grommet is installed instead of the water drain hose.

Please ensure correct installation of the grommet!

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