51 31... Instructions on gluing windscreen

Work steps for removing and installing windscreens: 

• is displayed at the end of this document by clicking on the "framed cross-reference"

General: 

The windscreen and rear window (also the rear side windows if necessary) are bonded to the body. This gluing will increase the torsional strength of the vehicle. To obtain perfect bonding, comply with the installation procedure described in the following.

It is possible to tow or drive without windscreen or rear window.

The windscreen must be secured with yellow plastic adhesive tape after being installed. The paint must be completely hardened after painting work.

• Set down window glass and process on BMW-approved X-universal stand.
• In winter, the vehicles must stand in a room with a temperature of at least 15°C.

On-the-job safety: 

When working with adhesive products (adhesive, cleaning agent, bonding agent etc.):

• Wear protective goggles, protective gloves and if necessary an apron.
• Ensure rooms are well ventilated.
• Change work clothing contaminated with adhesive immediately.
• Change work clothing contaminated with solvents and swelling agents immediately (keep spare work clothing on hand).
• Take skin protection measures, provide washing facilities including hot water, use silicone-free skin creams
• Provide eye bath facilities, change water regularly (once a month).
• Comply with the relevant safety regulations
• Do not eat, drink or smoke in areas of PUR processing.

Replacement of windscreens: 

Version with head-up display (HUD):

• Marking for HUD  must be present on the windscreen

Version with front passenger airbag:

• Stick on reminder label

Tools for cutting through adhesive bead: 

Type	Type	Order/part number
Special cutter (manufacturer: Fein) with oscillating blade	Pneumatically operated	81 43 9 429 183
	Electrically operated	81 43 9 427 786
BMW blade set	All required blades	81 43 9 428 596
Blade (U-shape)	19.5 mm (1)	6 39 03 118 01 3
	24 mm	6 39 03 076 01 6
	36 mm	6 39 03 079 01 2
	45 mm	6 39 03 154 01 0
Blade (straight with stop roller)	16 to 35 mm (adjustable)	6 39 03 143 01 3
	10 mm (fixed)(1)	6 39 03 189 01 0
	14 mm (fixed)	6 39 03 082 01 6
"Roll Out 2000"	Wire cutting system (1)	81 62 0 301 76 8
Scalpel	for heavy-duty applications (1)
Handles for cutting wire	Self-locking (1)	special tool 51 3 270
(1) not included in BMW blade set

Storage temperature: 

Storage temperature of all adhesive products of 5°C to 25°C must be observed.

Adhesive: 

The BMW-approved 1-component polyurethane adhesive must be used for bonding.

• Adhesive cartridge (part number 83 19 0 152 031)

Adhesive is applied to window glass with cartridge gun (pneumatically or electrically operated, sourcing reference:

When using accelerator (hot processing): 

• Temperature (min. 80 ± 5°C) of cartridge oven must be checked every morning. Connect temperature sensor to DIS (Diagnosis and Information System), if necessary in conjunction with MIB (Measurement Interface Box)
• Heat adhesive for at least 1 hour in cartridge oven to 80 ± 5°C
  • Write date and time on adhesive when inserting into cartridge oven
  • Insufficient heating (< 1 hour) results in the formation of bubbles/blisters (gluing/cementing not permitted)
  • Temperature < 80 ± 5°C results in the formation of bubbles/blisters (gluing/cementing not permitted)
• Remove cured adhesive prior to further processing.
• Mistake in mixing in event of an interruption in application >1 minute (gluing/cementing not permitted)
  • A test bead of 50...70 mm must be rejected after an interruption in application
• Best before dates of accelerator and adhesive must not be more than 3 months apart
  • Best before date >3 months results in the formation of bubbles/blisters (gluing/cementing not permitted)

Sealed adhesive:

• May only be stored for a maximum of 8 hours once it has been heated up to 80 ± 5°C.
• The adhesive will be damaged if this time is exceeded (gluing/cementing not permitted)
• Damaged adhesive must not be used and must be disposed of in compliance with national regulations
• Cartridge may only be heated up once
  • If the lower label is black, this adhesive may only still be used cold without accelerator while adhering to the Best before date.

Adhesive Best before date: 

Repair kit and adhesive cartridges are marked with a date (Best before).

The adhesive cannot be used after this date.

Adhesive disposal: 

Pure hardened adhesive is handled as normal waste.

The adhesive is disposed of in paper bags so that it can react with moisture.

Non-hardened adhesive, cartridges and mixtures of adhesive and solvents and the like must be disposed of as special waste.

Accelerator: 

Accelerator is screwed onto the adhesive cartridge and contains a reaction paste which is mixed with the heated adhesive.

Bonding agent (activator): 

The BMW-approved bonding agents must be used to treat bonding areas:

• "Glass Activator 1" (on glass ceramic material)
• "Paint Activator A" (on sheet metal flange or residual adhesive bead)

Bonding agent Best before date: 

Repair kit and bonding agent are marked with a date (Best before).

• The bonding agent may only be used up to this date (if not already opened previously).
• Once it has been opened (locking ring broken), use for 1 week only even if the Best before date has not been reached.

Removal of window glass: 

Cover side panels, roof aerial and if necessary interior trim with protective covers.

Tape off body with fabric adhesive tape (e.g. Tesa) in areas where the oscillating blade could damage the window glass or the paint.

When using cutting wire, pull cutting wire ends through special tool 51 3 270  , bend and tape off with fabric adhesive tape (e.g. Tesa) (risk of injury and damage).

When removing the windscreen:

• Wear protective goggles and gloves.

Cut through adhesive bead of window glass:

• with "Roll Out 2000"  (wire cutting system); no paint is damaged here in the case of narrow gaps
• with special cutter and oscillating blade

Prior to each use, regrind the blade with a grinding stone while the machine is running (new blades also).

Avoid damage to paintwork on body cutout.

Guide blade carefully between body and window glass.

Run blade of knife parallel to glass.

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

To remove adhesive bead in body cutout (and on window glass if reusing):

• Use a scalpel for heavy-duty applications
• Cut off residual adhesive to a thickness of approx. 0.5 mm
• Remove residual bead only briefly before bonding

Damage to paintwork in body aperture: 

To ensure long-term corrosion protection, it is absolutely essential to touch up damage to paintwork!

The "BMW Color System" painting handbook forms the basis of these repair instructions and must be observed without fail.

Touch up damage to paintwork on body cutout with BMW multibase filler.

Grind out scratches in non-visible areas and touch up with BMW multibase filler.

Grind extensive areas of damage down to the bare metal and coat with BMW multibase filler (coating thickness 30... 40 μm).

Hardening time:

• With infrared, at least 10 minutes
• Without infrared for at least 60°C, at least 30 minutes
• Without infrared for at least 20°C, at least 24 hours

If a complete build-up of paint is required in the visible area:

• Tape off primed bonding flange before applying top coat

Treatment of glued area in body: 

Glue	Treatment
Bonding and sealing compound for car window glass	Clean with spirit (available in pharmacies). Observe an air drying time of at least 1 minute (at least 15 minutes when applied to residual bead) Apply "Paint Activator A" to paint and residual bead Observe an air drying time of at least 1 minute (at least 10 minutes when applied to residual bead)

Preparation for assembly: 

Prepare plastic nozzle(s) for shaping adhesive bead (when not using the standard nozzle), can be cut to size during the air drying time.

Lay a test bead of approx. 50 mm - watch out for formation of bubbles/blisters when hot cementing; if OK, apply immediately to window glass.

• Interruption must be < 5 second (incorrect mixture ratio).

Cartridge must be vertical to window glass.

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

Glass ceramic material must not be damaged and must be treated as follows.

Treatment of glass ceramic surface (inside of window): 

Adhesive (with part numbers)	Treatment
Hot cementing: 83 19 0 147 370 Cold cementing: 83 19 0 147 369 Adhesive cartridge: 83 19 0 152 031	Clean with spirit (available in pharmacies). Observe an air drying time of at least 1 minute Apply a thin coating of "Glass Activator 1" Observe an air drying time of at least 10 minutes

Version with inspection window for vehicle identification number in windscreen only (all except US/GB):

• Seal inspection window (bottom left) with Sika primer 206 G+P

Adhesive quantities: 

Approx. 1 1/4 adhesive cartridges are required to cement the windscreen on the following vehicles:

• 7 Series
• 5 Series from E60
• X5
• X3

In the case of hot cementing (with accelerator), the missing residual bead is applied from a second adhesive cartridge (not contained in the repair kit) but while cold and without accelerator (bubbling).

Minimum hardening period is thus not increased.

Effect of differing adhesive quantities: 

Too little adhesive:	Too much adhesive:
Windscreen rests too low in body cutout Strains/tensions may occur (windscreen breakage) Insufficient squeezing of adhesive bead (leaking)	Windscreen rests too high in body cutout Wind noise may occur Strains/tensions may occur (windscreen breakage) Fouling of add-on parts by emerging adhesive Adhesive on uninsulated strainer pressure lines of aerial(s) (interference of reception)

Spacer buffers: 

Before sticking on new spacer buffers, remove all remaining traces of old spacer buffers completely.

Position of spacer buffers must be observed exactly.

Incorrectly fitted spacer buffers will result in:

• Windscreen glass breakage
• Leakage (if the spacer buffer is in the adhesive area)
• Wind noises

Assembly: 

To prevent a pressure increase in the vehicle interior when the doors are closed:

• Open a window

Remove adhesive residue immediately with adhesive remover. Do not press out the window glass again.

Hardened adhesive can only be removed by machine.

Check height of windscreen/rear window with special tool 51 0 010  or 51 3 210  .

Assemble car.

Hardening: 

The adhesive hardens as it reacts with air humidity (with accelerator also due to mixed-in reaction paste) at room temperature.

Minimum hardening time (table) is obtained from 22°C and 38 % relative air humidity.

At ambient temperatures above 23°C and 50 % relative air humidity (hot countries), the adhesive open time is shortened to approx. 5 minutes (skin formation time).

The adhesive hardening process is interrupted completely at ambient temperatures below 5°C. In this event, there will be no increase in the strength of the adhesive bond.

Do not subject the vehicle to load on one side during the minimum hardening time such as e.g.:

• one wheel on curb
• lifting platform
• etc.

Maneuvering inside garage/workshop:

• only permitted on level ground
• do not under any circumstance driver over access ramps, e.g. into multi-store car parks

Remove adhesive tapes after hardening time.

If you fail to adhere to the minimum hardening times:

• leaks and wind noises will occur when the windscreen is moved

Glues and their minimum hardening times: 

Glue	Minimum hardening time "without passenger airbag" (after which vehicle can be moved)	Minimum hardening time "with passenger airbag" (countries where seatbelt use is not required by law)
Hot processing with accelerator	2 hours	3 hours(1)
Cold processing	9 hours	20 hours(1)
NOTE: (1) Vehicles with passenger airbag:  The vehicle can be handed over to the customer after the hardening period (vehicle can be moved, adhesive-dependent) with the following warning: Once the windscreen glass has been bonded, all occupants must travel with their seatbelts attached for "... hours"!  The time is taken from the "Minimum hardening period" table for countries where seatbelt use is not required by law.

Locate leaks: 

• by spraying water underneath sealing lips
• with ultrasonic leak detector

If necessary, seal leakage with appropriate nozzle.

Version with GPS navigation system 1 (up to 9/97): 

After installation of rear window:

• Recalibrate magnetic field sensor
• Refer to function description in BMW scan tool DIS (Diagnosis and Information System)

Version with rain sensor, rain/light sensor or rain/light solar sensor: 

Remove rain sensor, rain/light sensor or rain/light solar sensor.

After replacing windscreen:

• Initialize rain sensor, rain/light sensor or rain/light solar sensor
• Refer to function description in BMW scan tool DIS (Diagnosis and Information System)

Version with fogging sensor: 

After replacing windscreen:

Replace fogging sensor.

Version with head-up display (HUD): 

When replacing windscreen, replace rain/light solar sensor, see 61 35 177 REMOVING AND INSTALLING (REPLACING) RAIN/LIGHT SENSOR .

Before bonding, install windscreen with seal(s) and check HUD  ; if necessary, press expanding foam tape down with hand roller.

After bonding windscreen, check and if necessary adjust HUD  . See 62 30... ADJUSTING HEAD-UP DISPLAY (DISPLAY ADJUSTMENT) .