Procedures

51 71 ... Rear Spoiler Gluing Instructions

General points:
The rear spoiler is glued to the rear window. In order to obtain a perfect bond, you must follow the installation procedure described below.
After installation, the rear spoiler must be secured with yellow plastic adhesive tape (sourcing reference: BMW Parts Service); the paint must therefore be completely hardened after painting work.

- In winter, the vehicles must be kept in a room with a minimum temperature of 15 °C.
When working with adhesive products (glue, cleaning agent, glass primer etc.):
- Wear protective goggles, protective gloves and, if necessary, aprons.
- Ensure rooms are well ventilated.
- Change work clothing which has been contaminated with adhesive immediately.
- Change work clothing which has been contaminated with solvents and swelling agents immediately (always keep a spare change of work clothing)
- Take skin protection precautions, provide washing facilities with hot water and use skin creams that do not contain silicone
- Keep eye baths on hand, change water regularly (once a month)
- observe all relevant safety regulations
- Do not eat, drink or smoke in areas where PUR is being processed

Adhesive:
For gluing work, only use BMW-approved 1-component polyurethane adhesives.
- Original BMW* for cold application
- SikaTack - Ultrafast* for hot application
- Sikaflex 255 FC for cold application
* Sourcing reference: BMW Parts Service
The adhesive is applied to the rear spoiler with a cartridge pistol (operated by compressed air or electric power, sourcing reference: BMW Parts Service).

NOTE:
When using SikaTack - Ultrafast (hot processing):
- If necessary, open aluminum membrane at rear end of cartridge
- Heat up adhesive for one hour in cartridge oven (sourcing reference: BMW Parts Service) to 80 °C
- Remove hardened adhesive compound before further application
Sealed adhesive:
- can be heated up several times.
- may however only be stored for max. 10 hours when heated to 80 °C.
- will be damaged if this period of time is exceeded.
- cannot be used if damaged
- must be disposed of in accordance with the relevant regulations.

Adhesive expiry date:
The repair set and glue cartridges are marked with an expiry date. The glue 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.

Removal of rear spoiler:
When cutting out the rear spoiler:
- Wear protective goggles and protective gloves.
The adhesive bead is cut through with a heavy-duty scalpel, if possible without damage to the rear spoiler.
To remove residual adhesive bead from rear spoiler and from rear window (if rear spoiler is to be reused):
- Use a scalpel for heavy-duty applications.

Treatment of glued area on rear spoiler:







Preparation for assembly:
Prepare plastic nozzle for shaping adhesive bead; it can be cut during the air drying times.

Treatment of rear window (outside of window):







Assembly:

CAUTION:
- Assembly must be completed within 10 minutes; otherwise the cement bead will form a skin which will not be able to stick properly.
- To secure the rear spoiler, only yellow plastic adhesive tape (sourcing reference: BMW Parts Service, Part Number 83 19 9 410 979) may be used.

It is absolutely essential to remove contamination by residual glue before the glue hardens using adhesive cleaner (Sika remover 208, sourcing reference: BMW Parts Service). While doing so, do not move rear spoiler again.
Hardened glue can only be removed by machine.

Hardening:
The glue hardens through reaction with air moisture at room temperature.
The minimum hardening period is achieved at 22 °C and 38% relative air humidity.
refer to table.

Glues and their minimum hardening times: