51 31... General procedure when dismantling/installing bonded window glass

1. Follow general instructions on window bonding: 

See SAFETY AT WORK .

See INFORMATION ON VEHICLE PROTECTION .

See MATERIALS FOR WINDOW BONDING .

See GENERAL NOTES ON THE HEAD-UP DISPLAY .

See TOUCHING UP PAINTWORK DAMAGE .

2. Disassembly 

The following dismantling methods are applied, according to the version:

• ROLL OUT 2000 
• OSCILLATING KNIFE  (not permissible for vehicles with window bonding on carbon body components)
• Cutting wire with WIRE PULL HANDLES 
• Windscreen removal system "SPIDER "

Unless otherwise described, only use this method when replacing the window glass.

Follow the vehicle-specific repair instructions!

3. Installation 

3.1 Preparation 

Position the windscreen or rear window on a universal work top or secure the components on a tool trolley using suction lifters.

Attach two suction lifters to the outsides of the window glass in the event of storage on a universal work top.

According to its size, fix side and door window glass onto the tool trolley using suction lifters or special tool 51 3 220  and set down on a suitable support.

Always keep the suction faces of the window glass suction lifters dry and clean.

Bond two yellow plastic adhesive tapes (1) approx. 400 mm in length to the roof.

(A) = 250 mm

Only the yellow plastic adhesive tape may be used to fix the window glass.

The glass will slip down if other adhesive tapes are used.

Window glass slippage will result in leaks and wind noises.

Fig 1: Identifying Plastic Adhesive Tapes To Roof Dimension

Courtesy of BMW OF NORTH AMERICA, INC.

After completing the paint work, the paint must be fully hardened before the plastic adhesive tapes are applied.

3.2 Pre-treatment of bonding surfaces 

• Clean window glass and body aperture (with residual adhesive bead) with cleaning agent R2

  Attention!  Do not  use Sika remover 208 for cleaning in the adhesive area.

• Observe an air drying time of at least 5 minutes (at least 15 minutes when applied to residual adhesive bead)
• Remove residual adhesive bead from body and window glass (see point "3.3 Remove adhesive residue from the body and window glass" below)
• Touch up PAINTWORK DAMAGE to body aperture with BMW multibase filler (except for carbon body components)

Pretreatment on new body component (no residual adhesive beads present):

3.3 Remove adhesive residue from the body and window glass 

Do not remove residual adhesive bead (1) until shortly before bonding.

Use the pitchweld scraper to remove the residual adhesive bead (1) from the body aperture and window glass (3).

Position the pinchweld scraper (2) as shown and remove the residual adhesive bead (1) up to a thickness of approx. 0.5 mm.

Attention! 

Carbon body components are not to have scratches with a depth greater than 0.2 mm.

Fig 2: Removing Adhesive Residue From Body And Window Glass

Courtesy of BMW OF NORTH AMERICA, INC.

Note, comply with life module check!

3.4 Installation of spacer (spacer buffer/dual-lock tapes) 

Completely remove all residue of existing spacers before positioning on new adhesive spacers.

The exact position of the spacers must be retained (see vehicle-specific service information).

Incorrectly fitted spacers will result in:

• Window glass breakage due to tension
• Leakage (if the spacer is in the adhesive area)
• Wind noises

3.5 Add-on part 

Depending on the version, attach sealing, expanding foam tape, rain sensor, etc.

Carry out INITIALIZATION of rain sensor.

Follow the vehicle-specific repair instructions!

3.6 Pre-treatment of new window glass 

• Apply a thin coat of glass activator (yellow stick); a final wipe is not necessary.
• Observe an air drying time of at least 2 minutes

The glass activator is used for adhesion between glass or ceramic glass and the adhesive. Therefore, a thin, homogeneous and continuous line of glass activator must be applied. If the window glass is to be reused with a cut-back adhesive bead, glass activator is not needed.

It must be guaranteed that a 1 to 2 mm wide line of glass activator is located on the ceramic glass next to the squeezed adhesive bead.

The adhesive bead may become up to 15 mm wide in compressed condition. The width of the glass activator is therefore normally a minimum of 17 mm for windscreens and rear windows and a minimum of 9 mm for side windows.

The glass activator may not be applied in the field of view or the point grid. Fresh glass activator in the field of view must immediately be wiped off with cleaning agent R2 because hardened glass activator will leave a haze behind.

3.7 Version with inspection glass for vehicle identification number in windscreen 

Foam tape (2) must be installed to protect the vehicle identification number (1) against tampering. If applicable, install foam tape TNR 07 14 7 222 909.

Close off the inspection glass on the windscreen (bottom left) with Sika bonding base VP 206.

Fig 3: Identifying Foam Tape And Vehicle Identification Number

Courtesy of BMW OF NORTH AMERICA, INC.

Except for: 

• All US/GB models
• All models with a black dashboard cover, which means that the vehicle color cannot be seen through the inspection glass

3.8 Nozzle preparation 

Use standard nozzle C for windscreens, rear windows, and body-specific fixed side window glass.

Prepare plastic nozzle for fixed door window glass.

Fig 4: Identifying Plastic Nozzle Dimension Of Fixed Door Window Glass

Courtesy of BMW OF NORTH AMERICA, INC.

Deviations are described in the vehicle-specific repair instructions.

Black ceramic glass impermeable to UV light is located on the peripheral zone of the inside of the window to protect the adhesive bead.

Ceramic glass must not be damaged.

3.9 Apply adhesive 

Adhesive is applied to the window glass using a cartridge gun.

Glue cartridge must be vertical to window glass.

The almost vertical part of the adhesive bead must be facing the outer window glass edge.

On window glass with guidelines, the adhesive bead must be applied centrally between the guidelines.

On window glass without guidelines, the position of the adhesive bead is specified in the vehicle-specific repair instructions.

Coat bead joint.

Effect of differing adhesive quantities:

Note on bonding of windscreen: 

The adhesive amount specified in the vehicle-specific repair instructions is sufficient if the specified adhesive bead size is maintained.

If too much adhesive is applied due to application-related variations (manual application), the specified adhesive amount may not be sufficient. To avoid interrupting adhesive application for longer than the permitted period, have another glue cartridge ready.

3.10 Mounting the window glass 

To prevent a pressure build-up in the passenger compartment when the doors are closed:

• Open a side window

Mount window glass (1) with suction lifter (51 3 010).

Fig 5: Fixing Window Glass

Courtesy of BMW OF NORTH AMERICA, INC.

3.11 Adjusting the window glass 

To avoid wind noise, the front and rear windows (1) must be lower than the roof outer skin (2).

Check ride height of the windscreen or rear window using special tool 51 0 010 .

Dimension (A) of window glass offset, refer to vehicle-specific service information.

X = measurement stages 1... 4 mm

Fig 6: Identifying Window Glass Offset Dimension

Courtesy of BMW OF NORTH AMERICA, INC.

3.12 Fixing the window glass 

Fix the window glass with yellow plastic adhesive tapes (2).

Immediately remove dirt contamination with adhesive residue using Sika remover 208. Do not press out the window glass again.

Hardened adhesive can only be removed mechanically.

Fig 7: Fixing Window Glass

Courtesy of BMW OF NORTH AMERICA, INC.

3.13 Label 

Depending on version, apply LABEL .