51 31 000 Removing and installing front windscreen

NOTE:

To bond windshield:
Adhesives for cold and hot working are permitted.
Remove interior rearview mirror, refer to 51 16 060 REMOVING AND INSTALLING OR REPLACING INTERIOR REARVIEW MIRROR .
If necessary, remove rain sensor, refer to 61 35 175 REMOVING AND INSTALLING/REPLACING RAIN SENSOR .
Remove both sun visors and counter supports, refer to 51 16 080 REMOVING AND INSTALLING OR REPLACING SUN VISOR AND LEFT OR RIGHT COUNTER SUPPORT .
Remove both panels for front roof pillar, refer to 51 43 201 REMOVING AND INSTALLING OR REPLACING TRIM FOR FRONT LEFT OR RIGHT ROOF PILLAR .
Remove front lid, refer to 41 61 000 REMOVING AND INSTALLING ENGINE HOOD .
Remove both gutter strips on windshield, refer to 51 31 030 REMOVING AND INSTALLING OR REPLACING LEFT OR RIGHT GUTTER ALONG WINDSHIELD .
Remove both windshield wiper arms.

Cold processing:

Comply with instructions on gluing windows, refer to 51 31... INSTRUCTIONS ON GLUING WINDSCREEN

Warm processing:

Open aluminum membrane at rear end of glue cartridge.

Heat glue cartridges to 80°C for one hour in oven (sourcing reference: BMW Parts Service).

Comply with instructions on gluing windows, refer to 51 31... INSTRUCTIONS ON GLUING WINDSCREEN

Fig 1: Identifying Oven

NOTE: Cover front side panels with protective covers.

Lower front headliner slightly.

Remove connector (windshield heating).

Fig 2: Removing connector (windshield heating)

Partially remove seal and let it hang down.

Fig 3: Removing Seal

Lift out expanding rivets and pull finisher (1) upwards to remove.

Seal hose connection for windshield wash nozzles on hood lid.

Fig 4: Removing Expanding Rivets & Pull Finisher

CAUTION: Seal is reinforced with aluminum strip.
Turning carefully, wind seal out (windshield breakage).

Fig 5: Removing Wind Seal

Mask body all around with fabric adhesive tape (e.g. Tesa).

Windshield
Glue bead
Body aperture
Fabric adhesive tape

Fig 6: Masking Windscreen Body With 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.

Fig 7: Fitting Knife To Tool

Carefully insert knife between body and windshield.

Fig 8: Inserting Knife Between Body & Windshield

Guide handle of knife parallel to windshield.

Fig 9: Guiding Handle Of Knife Parallel To Windshield

Cut through glue bead all around and as close as possible to windscreen glass.

Body aperture
Glue bead
Knife
Windshield

Fig 10: Cutting Glue Bead

Lift out the windscreen using special tool 51 3 010. Pull off adhesive masking tape all around.

Fig 11: Lifting Out Windscreen Using Special Tool 51 3 010

CAUTION: In order to guarantee long-term corrosion protection, it is absolutely essential to touch up damage to paintwork (scratches or large-surface damage), refer to 51 31... INSTRUCTIONS ON GLUING WINDSCREEN

When reusing the windshield:

Remove glue residue on windshield with a scalpel (1) for heavy-duty applications to approx. 0.5 mm.

Fig 12: View Of Scalpel

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

Fig 13: Fitting Seal To Top Of Windshield

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), refer to 51 31... INSTRUCTIONS ON GLUING WINDSCREEN

(A) = 21 mm

NOTE: Note specified ventilation time!

Fig 14: Securing Cable (Windshield Heating) With Glue Tape

CAUTION: The basic filler must have hardened!

Treat body in adhesive area with BMW-approved materials (repair kit, sourcing reference: BMW Parts Service), refer to 51 31... INSTRUCTIONS ON GLUING WINDSCREEN

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.

Fig 15: Removing Glue Residue With Scalpel

Installation of spacer buffers:

Two different spacer buffers are fitted. Keep exactly to the installation position (risk of broken windshield).

Square spacer (height stop, wind noises)
Semicircular spacer buffer (spacing for adhesive bead) (A) 3.8 mm

CAUTION: Wind noises may result if measurement (A) is not 3.8 mm.

Fig 16: Identifying Spacing Of Adhesive Bead On Square Spacer

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

Fig 17: Identifying Distance Between Square Spacer & Water Drainage Bore

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 sunroof.

Fig 18: Attaching Square Spacer To Center Of Cavity

CAUTION: To avoid breaking windshield:
Before sticking on new spacer buffers, remove remains of old spacer buffers completely.
Stick on semi-circular spacer buffers (1) "outside" in molding (2) on left/right.

Fig 19: Sticking Semi-Circular Spacer Buffers (Outside) In Molding 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 semi-circular spacer buffers (1) "center/outside" between bores (2).

NOTE: Attach semi-circular spacer buffer (1) to end of metal radius (3).

4 Expanding foam tape

Fig 20: Attaching Semi-Circular Spacer Buffer To End Of Metal Radius

In direction of travel, right:

Stick on semi-circular spacer buffers (1) "center/outside" between bores (2).

NOTE: Attach semi-circular spacer buffer (1) to end of metal radius (3).

4 Expanding foam tape

Fig 21: Attaching Semicircular Spacer Buffer To End Of Metal Radius

Attach semi-circular 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

Fig 22: Identifying Distance For Attaching Semicircular Spacer Buffer

Cut nozzle to size.

Dimensions:

7 mm
10_-1 mm

Fig 23: Identifying Dimension For Cutting Nozzle

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.

Fig 24: Identifying Cartridge Position To Windshield Glass

Effect of differing adhesive quantities:

DIFFERING ADHESIVE QUANTITIES EFFECT

Insufficient adhesive:	Excessive adhesive:
Windshield positioned too low in body cutout	Windshield positioned too high in body cutout
Stresses may occur (risk of broken windshield)	Wind noise may occur

Shape of glue bead:

7 mm
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.

Fig 25: Identifying Shape Of Glue Bead

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.

1 mm
2 mm
4 mm

Fig 26: Identifying Distance Of Upper Glue Bead To Gasket

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

Fig 27: Identifying Plastic Adhesive Tapes Adhesive Area

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).

Fig 28: Securing Windshield Position On Top With Two Yellow Plastic Adhesive Tapes (Tesa)

Preload on top of windshield to prevent wind noise:

Fig 29: Identifying Preload On Top Of Windshield

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.

100 mm
100 mm

Fig 30: Identifying HR Foam Blocks Distance From Top & Distance At Side

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.

NOTE: Do not stick plastic adhesive tape (1) above A-pillar finisher (3) or ITS head airbag.

Fig 31: Securing HR Foam Blocks With Plastic Adhesive Tape (Tesa)

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:

by spraying water underneath sealing lips
with an ultrasonic leak detector (sourcing reference: BMW Parts Service)

If necessary, seal off leakage with corresponding nozzle.