41 00... Carrying Over Hole Pattern

When replacing a body component, it is necessary to carry over the hole pattern from the existing body to the new component.

The following pictures are a schematic representation of carrying over the hole pattern on the example of the front wheel arch.

Necessary preliminary tasks

Adjust new part to fit with straightening attachment.

Insert paper stencil (1) between new component (2) and engine carrier and secure with adhesive tape (3).

Carry over contour (4) of new component to stencil.

Remove new component.

Fig 1: Inserting Paper Stencil Between Component And Engine Carrier

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(1) = contour of new component.

Carry over positions of holes (2) to stencil by pressing down with thumbs.

Remove stencil.

Fig 2: Identifying Holes Positions

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Fig 3: Identifying Centerpoints Of Holes With Crosses

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Lay stencil (1) on a flat surface.

Mark centrepoints of holes with crosses (2).

Then pierce paper through centrepoints (3) of holes with a pointed object.

Align stencil (1) according to contours (2) to inside of new component and secure with adhesive tape (3).

Fig 4: Identifying Stencil, Contours And Adhesive Tape

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Turn over new component.

IMPORTANT: Crosses must not be visible in this view!

Set punch marks at pierced centrepoints (1).

Grip directly under punch marks for marking with punch.

Fig 5: Identifying Pierced Centrepoints And Stencil

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Remove stencil (2).

Drill holes to approx. 3 - 4 mm dia. at punch marks (1).

Position new component (1) with straightening attachment on vehicle.

Drill out holes (2) to 6.7 mm dia.

Fig 6: Identifying Drill Hole Positions

Courtesy of BMW OF NORTH AMERICA, INC.