41 11 300 Replacing Cover For Longitudinal Member With Left And Right Door Pillar (Partial Replacement B-Pillar)

Observe procedure for REPAIR STAGE 3 .

Read contents of BODY, GENERAL .

Spot-weld bonding is used on this vehicle.

Observe specific PROCEDURE .

Use only approved SPOT-WELDING APPARATUS  for repairs.

Place vehicle on straightening bench.

Following new body parts are required (refer to BMW ELECTRONIC PARTS CATALOGUE ):

• (1) B-pillar with entrance
• (2) Inside front side frame
• (3) ADHESIVE K1  (not shown)

Fig 1: Identifying B-Pillar And Front Side Frame

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Removing entrance cover with door post 

Fig 2: Identifying Severance Cuts Dimensions

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Mark severance cuts in accordance with specified dimensions and cut.

Dimension a = approx. 280 mm from centerpoint of 25 mm dia. hole.

Dimension b = approx. 110 mm after cut a.

Dimension c = approx. 120 mm from edge of roof frame.

Dimension d = approx. 100 mm below cut c.

Measurement e = approx. 155 mm from centerpoint of 25 mm dia. hole.

Dimension f = approx. 80 mm before cut e.

Open welded connections in areas (1).

Fig 3: Identifying Severance Cuts To Hole Dimension

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Mark severance cuts in accordance with specified dimensions and cut.

For severance cut (2) cut all the way through B-pillar.

Measurement a = approx. 330 mm from centerpoint of 25 mm dia. hole.

Measurement b= approx. 205 mm before centerpoint of 25 mm dia. hole.

Dimension c = approx. 170 mm from edge of roof frame.

OPEN  welded connections and welding spots in the areas (3).

Installation note:

Weld new parts in areas (4) as standard.

Apply repair welding spots in the area (3) of sill bottom edge at the available welding spots on new part/vehicle.

This is necessary because the adhesive between the spot flanges acts as an insulator.

View from below:

Open welded connections in areas (1).

Fig 4: Identifying Welded Connections Areas

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View from inside:

Mark severance cut (1) and cut.

Open welded connections in areas (2).

Fig 5: Identifying Severance Cut And Welded Connections Areas

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Open spot-welded adhesive joints in area (1)

Open bonded connection in area (2).

Remove B-pillar.

Fig 6: Identifying Spot-Welded Adhesive Joints And Bonded Connection Area

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Open welded connections in areas (1).

Remove bulkheads (2).

Fig 7: Identifying Bulkheads And Welded Connections Areas

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New part preparation 

Mark severance cuts on new part of B-pillar in accordance with severance cuts on the vehicle and cut.

• (1) B-pillar, outer
• (2) B-pillar reinforcement
• (3) Upper B-pillar reinforcement

Mark further severance cuts on new parts in accordance with severance cuts on vehicle and cut.

Prepare REINFORCEMENT PLATES  at severance cuts.

Fig 8: Identifying B-Pillar Reinforcement And Reinforcement Plate

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Slightly remove adhesive foam of cavity sealing (2) in area (1).

Cool area (1) with compressed air during welding.

Fig 9: Identifying Adhesive Foam Of Cavity Sealing Area

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

Fig 10: Identifying Bonding Surfaces

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Installation of B-pillar with reinforcement 

Clean bonding surfaces with cleaning agent R1.

Apply adhesive K1 to bonding surfaces.

Install new parts and reinforcement plates with alignment bracket or universal mount and weld.

Weld reinforcement plate (3) for upper B-pillar reinforcement from inside.

Fig 11: Identifying B-Pillar, Reinforcement Plate And Weld Area

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