Removing and Installing Front Windscreen
51 31 000 Removing And Installing Front Windscreen
NOTE:
- To bond windshield:
- Adhesives for cold and hot working are permitted.
- Remove interior rearview mirror.
- If necessary, remove rain sensor.
- Remove both sun visors and counter supports.
- Remove both panels for front roof pillar.
- Remove front lid.
- Remove both gutter strips on windshield.
- Remove both windshield wiper arms.
Cold processing:
Comply with instructions on gluing windows.
Warm processing:
Open aluminum membrane at rear end of glue cartridge.
Heat glue cartridges to 80 °C for one hour in oven.
Comply with instructions on gluing windows.
NOTE: Cover front side panels with protective covers.
Lower front headliner slightly.
Remove connector (windshield heating).
Partially remove seal and let it hang down.
Lift out expanding rivets and pull finisher (1) upwards to remove.
Seal hose connection for windshield wash nozzles on hood lid.
CAUTION:
- Seal is reinforced with aluminum strip.
- Turning carefully, wind seal out (windshield breakage).
Mask body all around with fabric adhesive tape (e.g. Tesa).
1. Windshield
2. Glue bead
3. Body aperture
4. Fabric adhesive tape
Fit knife (24 mm blade length, sourcing reference: BMW Parts Service) to the tool.
NOTE: If necessary, resharpen knife with machine running.
Carefully insert knife between body and windshield.
Guide handle of knife parallel to windshield.
Cut through glue bead all around and as close as possible to windscreen glass.
1. Body aperture
2. Glue bead
3. Knife
4. Windshield
Lift out the windscreen using special tool 51 3 010.
Pull off adhesive masking tape all around.
CAUTION: In order to guarantee long-term corrosion protection, it is absolutely essential to touch up damage to paintwork (scratches or large-surface damage).
When reusing the windshield:
Remove glue residue on windshield with a scalpel (1) for heavy-duty applications to approx. 0.5 mm.
Fit seal (1) to top of windshield and press into place.
NOTE: Seal (1) and windshield are marked in the center (2).
3 Mirror base
Secure cable (1) (windshield heating) with glue tape.
Treat windshield in glued area (A) with materials approved by BMW (repair kit, sourcing reference: BMW Parts Service).
(A) = 21 mm
NOTE: Note specified ventilation time.
CAUTION: The basic filler must have hardened.
Treat body in adhesive area with BMW-approved materials (repair kit, sourcing reference: BMW Parts Service).
NOTE: Note specified ventilation time.
Immediately before installing windshield,
remove glue residue in body cutout to approx. 0.5 mm thickness.
To avoid damaging paintwork in body cutout,
carefully remove glue residue with a scalpel.
CAUTION: Clean freshly cut residual glue bead with 2-propanol or glass activator only; do not, under any circumstances, use Sika bonding agent 205/5.
Installation of spacer buffers:
Two different spacer buffers are fitted. Keep exactly to the installation position (risk of broken windshield).
1 Square spacer (height stop, wind noises)
2 Semicircular spacer buffer (spacing for adhesive bead)
(A) 3.8 mm
CAUTION: Wind noises may result if measurement (A) is not 3.8 mm.
Version with slide/tilt sunroof:
Stick square spacer (1) at distance (A) to center, near water drainage bore (2), for slide/tilt sunroof on left/right.
(A) 5 mm
Model without sliding/tilting sunroof: Attach square spacer (1) to center of cavity (2).
NOTE: The water drainage bore is located here in models fitted with sliding/tilting sunroofs, see one work step previously.
CAUTION:
- To avoid breaking windshield:
- Before sticking on new spacer buffers, remove remains of old spacer buffers completely.
- Stick on semicircular spacer buffers
(1) "outside" in moulding (2) on left/right.
3 Expanding foam tape
NOTE: Expanding foam tape (3) over gap between sound insulation and cowl panel must be fitted from left to right, fit if necessary.
In direction of travel, left:
Stick on semicircular spacer buffers (1) "center/outside" between bores (2).
NOTE: Attach semicircular spacer buffer (1) to end of metal radius (3).
4 Expanding foam tape
In direction of travel, right:
Stick on semicircular spacer buffers (1) "center/outside" between bores (2).
NOTE: Attach semicircular spacer buffer (1) to end of metal radius (3).
4 Expanding foam tape
Attach semicircular spacer buffer (1) "centrally" at distance (A) on right side (left side in direction of travel) at same height as bore (2).
(A) 25 mm
3 Expanding foam tape
Cut nozzle to size.
Dimensions:
(A) 7 mm
(B) 10(-1) mm
NOTE:
- For an even application of adhesive bead:
- Use a cartridge gun (operated pneumatically or electrically, sourcing reference: BMW Parts Service).
Check expiration date of glue.
If necessary, apply a test bead before gluing.
Cartridge must be held perpendicularly to the windscreen glass.
NOTE: Approx. 1 1/4 adhesive cartridges are required for the windshield.
Effect of differing adhesive quantities:
Shape of glue bead:
(A) 7 mm
(B) 10(-1) mm
CAUTION:
- Apply adhesive bead swiftly (and uniformly) and install windshield. Maximum skin formation time of adhesive is 10 minutes.
- Maintain distance (X) to edge of windshield, refer to measurement (A) to (C) in next work step.
Maintain the distance (A) of the upper glue bead to the gasket, (B) at side and (C) bottom along the windshield edge.
CAUTION:
- To ensure that the water drainage channel of the slide/tilt sunroof is not sealed with adhesive, proceed as follows:
- In corners of seal at top and at break in sealing lip, continue drawing adhesive bead uniformly.
Maintain distance (B) at side and (C) at bottom along edge of windshield.
(A) 1 mm
(B) 2 mm
(C) 4 mm
NOTE: Adhesive area for plastic adhesive tapes (1) must be free of grease and dust.
Attach two yellow plastic adhesive tapes (1)(Tesa) to roof at a distance (A) from outer corners.
Length: 400 mm
Width: 50 mm
(A) 250 mm
Using special tool 51 3 010, first position windshield at top, align evenly at sides, then install at bottom and press into position.
Press windshield upwards until seal contacts roof uniformly.
Secure windshield in this position on top with two yellow plastic adhesive tapes (1) (Tesa).
Preload on top of windshield to prevent wind noise:
When installing windshield (4), check that it is lower with respect to roof outer skin panel (1). This is the only way of ensuring sufficient pretension between the sealing lip (2) and the roof (prevention of wind noise). Check installation position of windshield (4) in middle of vehicle with special tool 51 3 210; a clearance (A) is permitted.
Dimensions:
Standard windows = designation "N":
(A) = 0 - 1.5 mm
Anti-theft windows = designation "S":
(A) = 0 - 0.6 mm
Pretension is generated with special tool 51 3 130 (three HR foam blocks).
1 piece (1): 40 x 70 x 70 mm (W x H x D)
2 pieces (2): 40 x 30 x 70 mm (W x H x D) Position of HR foam blocks:
HR foam block (1), middle, at distance (A) from top.
HR foam blocks (2), distance (A) from top, distance (B) at side.
(A) 100 mm
(B) 100 mm
Open both front doors.
Secure HR foam blocks (2) with plastic adhesive tape (1) (Tesa).
Pretension windshield with plastic adhesive tape (1) (Tesa) until it is correctly positioned at top (refer to two work steps before).
NOTE: Do not stick plastic adhesive tape (1) above A-pillar finisher (3) or ITS head airbag.
CAUTION:
- Remove contamination caused by residual adhesive immediately with Sika remover 208 (sourcing reference: BMW Parts Service).
- Do not press out windscreen glass again for this purpose.
- Hardened glue can only be removed by machine.
Assemble car.
After the hardening time, remove support and adhesive tape.
NOTE: Locate leakage:
(A) by spraying water underneath sealing lips
(B) with an ultrasonic leak detector (sourcing reference: BMW Parts Service)
If necessary, seal off leakage with corresponding nozzle.