2.2 Larger defects (mechanical damage and larger separations of seal)

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Complete replacement of rubber seal necessary

Peeling off damaged rubber seal:
- Beginning at the stop, the gasket with the adhesive tape is slowly separated from the paint.
  The gasket is slowly pulled off at an angle of approx. 20° while applying constant force.
  
  Pay attention to the constriction of the adhesive tape.
  
  NOTE: Make sure the connection between adhesive tape and gasket is retained.
  When the adhesive tape separates from the gasket, the adhesive tape remaining on the paint must be fully separated at one location by approx. 10 mm until it is easy to grip.
  Pull off the adhesive tape by pulling strongly at an angle of approx. 20°.
  When existing gaskets are being peeled off with a hot air blower: Do not damage paintwork.
  Do not detach rubber-adhesive tape connection if at all possible.
Cleaning bonding surface:
- Soak and wipe away adhesive tape leftovers with a single-use towel fully soaked in adhesive cleaner (see BMW Parts Department).
  Wear protective gloves.
- Before performing a new bond, degrease and clear away other residuals from the entire adhesive area with cleaning agent (cleaning agent R2; see BMW Parts Department). Never use paint thinner!
- Carefully wipe off the adhesive area.
NOTE: Use necessary cotton- or fluff-free paper towel once only.
When using solvent: Observe the air drying time of > 2 minutes.
Do not touch the adhesive area after cleaning.
Prepare gasket:
Detaching protective film from bonding surface:
- Pull off the protective film off of the new gasket by approx. 15 cm using the tab.
IMPORTANT: Once the protective film has been removed, do not under any circumstances touch the exposed bonding surface.
Applying rubber seal:
- Attach gasket on roof aperture edge beginning at rear center. Use upper lip as reference edge.
  Press on the gasket by hand while pulling off the liner at the same time.
  
  Compress the gasket the corners; never stretch it. (critical area)
  
  NOTE: If positioned incorrectly, the gasket can still be pulled off, repositioned and pressed on again.
  Always ensure that you do not touch the bonding surface with your fingers or contaminate it in any way.
Establishing sealing joint:
- Where the beginning and end meet, a mark is created from pressing the loose end onto the beginning of the gasket.
  Cut off the gasket vertically along the marked line (use sharp knife or special scissors) and press in place.
- Visually check the pre-bonded gasket.
  NOTE: Small areas of gasket can remain stuck to adhesive tape of loose end.
Pressing on gasket:
- Press on the gasket with the hand roller
- Adhesive tape width up to 5 mm Contact pressure approx. 5 N
- Adhesive tape width up to 10 mm Contact pressure approx. 10 N
  Slide/tilt sunroof gasket only:
- Press gasket down firmly with a hand roller. Contact pressure ≥ 70 N.
  NOTE: Firm thumb pressure has approx. 30 N/cm²