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Home >> BMW >> 2017 >> M3 Automatic DCT Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Interior/Exterior Trim >> Body Equipment - Repair (F80) >> 51 31 Front And Rear Window >> 51 31... Removing windows with an oscillating knife

51 31... Removing windows with an oscillating knife

WARNING: Risk of injury!  Follow safety information for REPAIR WORK ON VEHICLES WITH AIRBAG SYSTEMS .
IMPORTANT: Handle sharp-edged tools with care (risk of damage to the head airbag and the window glass).
IMPORTANT: Follow the vehicle-specific repair instructions!
Always wear safety goggles and protective gloves for your own safety.
Cover the working area (side walls, roof-mounted antenna and if necessary, interior equipment) with protective covers.
Tape off body with fabric adhesive tape (e.g. Tesa) in areas where the oscillating knife could damage the window glass or the paint.

Use SUCTION CUPS (51 3 010)  to lift out the window glass.

Always keep both suction cups dry and clean to ensure optimum adhesion on the windshield.

Secure window glass against falling out.

G08511685Courtesy of BMW OF NORTH AMERICA, INC.

Depending on the area of application, knife 1 or 2 is used.

  1. Straight knife with adjustable thrust roller
  2. U-shaped knife

    Dimension (X) on the knife (1) can be adjusted individually (see the individual repair instructions).

    NOTE: Sharpen knife blade before every use on a running machine with a grinding stone (even with new knife blade).
    G08511686Courtesy of BMW OF NORTH AMERICA, INC.

Removing from the inside: 

Guide knife carefully between body and window glass.

Run blade of knife parallel to glass.

Take care not to damage paintwork.

Cut through adhesive bead all the way around.

Pull window glass outwards to remove.

G08529190Courtesy of BMW OF NORTH AMERICA, INC.

Removal from outside: 

Guide knife carefully between body and window glass.

Run blade of knife parallel to glass.

Take care not to damage paintwork.

Cut through adhesive bead all the way around.

Pull window glass outwards to remove.

G08511688Courtesy of BMW OF NORTH AMERICA, INC.

Cut through adhesive bead as closely as possible to window glass.

  1. Body aperture
  2. Adhesive bead
  3. Knife
  4. Window
    G08511689Courtesy of BMW OF NORTH AMERICA, INC.