51 31... Notes on window bonding
Version with head-up display (HUD):
When replacing windscreen, replace RAIN/LIGHT SOLAR SENSOR .
These instructions are not applicable to door window cementing (door "center") on the E38/L7:
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 | BMW 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 | ||
|
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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* (BMW part number 83 19 0 152 031)
Adhesive is applied to window glass with cartridge gun (pneumatically or electrically operated).
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.
If hot processing is not permitted, this is described in the relevant service information.
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.
Adhesive and accelerator must be paired while taking into account the Best before dates.
The accelerator may no longer be used if the Best before dates are more than 3 months apart.
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.
Close the bottle immediately after extracting the bonding agent (reaction with air).
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 ?m).
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 |
|
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 BMW part numbers) | Treatment |
|---|---|
Hot cementing:
Cold cementing:
Adhesive cartridge:
|
|
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.
- First apply cold adhesive to cowl panel at bottom (skin formation time)
- Accelerator from repair kit must not be used with the second cartridge (bubbling)
Bubbling results in leakage and insufficient bonding strength (torsional rigidity, passenger airbag).
Effect of differing adhesive quantities:
| Too little adhesive: | Too much adhesive: |
|---|---|
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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:
-