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41 00... Carrying Over Hole Pattern

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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: Securing Adhesive Tape
G09878391Courtesy of BMW OF NORTH AMERICA, INC.
  1. contour of new component.

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

Remove stencil.

Fig 2: Removing Stencil
G09878392Courtesy of BMW OF NORTH AMERICA, INC.
Fig 3: Identifying Centerpoints Holes And Stencil On Flat Surface
G09878393Courtesy of BMW OF NORTH AMERICA, INC.

Lay stencil (1) on a flat surface.

Mark centerpoints of holes with crosses (2).

Then pierce paper through centerpoints (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: Securing Adhesive Tape
G09878394Courtesy of BMW OF NORTH AMERICA, INC.

Turn over new component.

IMPORTANT: Crosses must not be visible in this view!

Set punch marks at pierced centerpoints (1).

Grip directly under punch marks for marking with punch.

Fig 5: Identifying Punch Marks At Pierced Centerpoints And Stencil
G09878395Courtesy of BMW OF NORTH AMERICA, INC.

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: Drilling Out Holes
G09878396Courtesy of BMW OF NORTH AMERICA, INC.