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: Identifying Contour Of Component And Positions Of Holes

Courtesy of BMW OF NORTH AMERICA, INC.

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

Remove stencil.

Fig 2: Identifying Contour Of Component And Positions Of Holes

Courtesy of BMW OF NORTH AMERICA, INC.

Fig 3: Identifying Lay Stencil And Holes Crosses

Courtesy of BMW OF NORTH AMERICA, INC.

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 Lay Stencil, Holes Crosses And Centrepoints

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Remove stencil (2).

Fig 5: Identifying Centrepoints And Punch Marks

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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 Punch Marks And Holes

Courtesy of BMW OF NORTH AMERICA, INC.