- Remove all mounds or loose pieces of urethane adhesive from the pinch-weld area.
- If the original window is being reused, remove all but a thin film of the existing urethane adhesive from the window surface by using a clean utility knife or razor blade scraper.
- Inspect the following components for the causes of a broken window:
- Inspect for any of the following problems in order to help prevent future breakage of the window:
- After repairing the opening as indicated, perform the following steps:
- Verify all primers and urethane adhesive are within expiration dates.
- Shake the pinch-weld primer black #3 for at least 1 minute.
- Use a new dauber in order to apply the primer to the surface of the pinch-weld flange (1).
- Allow the pinch-weld primer to dry for approximately 10 minutes.
- Install the windshield (1) and the VIN plate filler strip, if equipped.
- Install the window to the vehicle.
- Install the new windshield acoustic strip (1) to the windshield (2), if equipped or damaged.
- If installing a new window reveal molding, start in the center and work toward each end pressing firmly into place.
- Use a new dauber in order to apply glass prep clear #1 to the area approximately 10-16 mm (3/8-5/8 in) around the entire perimeter of the window inner surface.
- Apply a second coat of the glass prep clear #1 to the same area of the glass.
- Shake the glass primer black #2 for at least 1 minute.
- Use a new dauber in order to apply the glass primer black #2 to the same areas (2) that glass prep clear #1 was applied.
- Allow the glass primer to dry for approximately 10 minutes.
- Cut the applicator nozzle in order to provide a bead of 12.7 mm (1/2 in) wide and 12.7 mm (1/2 in) high.
- Use a cartridge-type caulking gun in order to apply a smooth, continuous bead of urethane adhesive.
- Use the edge of the window or the inside edge of the reveal molding as a guide for the nozzle in order to apply the urethane adhesive (1) to the inner surface of the window (3).
- With the aid of an assistant, place the window (2) in the opening. Align the left alignment pin first followed by the right prior to wetting out the adhesive bead.
- Press the window firmly into place in order to wet out the urethane adhesive bead.
- Clean any excess urethane adhesive from the body.
- Use a soft spray of warm water in order to immediately water test the window.
- Inspect the window for leaks.
- If any leaks are found, use a plastic paddle in order to apply extra urethane adhesive at the leak point.
- Retest the window for leaks.
- Maintain the following conditions in order to properly cure the urethane adhesive:
- Complete the window installation.
Caution: When working with any type of glass or sheet metal with exposed or rough edges, wear approved safety glasses and gloves in order to reduce the chance of personal injury.
Important: Remove all but approximately 2 mm (3/64 in) of the existing bead of urethane adhesive from the pinch-weld flange.
| • | The flange of the window opening |
| • | The window reveal molding |
| • | High weld |
| • | Solder spots on the pinchweld |
| • | Hardened sealer |
| • | Any other obstruction or irregularity in the pinch-weld flange |
Important: If corrosion of the pinch-weld flange is present or if sheet metal repairs or replacements are required, the pinch-weld flange must be refinished in order to restore the bonding area strength. If paint repairs are required, mask the flange bonding area prior to applying the color coat in order to provide a clean primer only surface. Materials such as BASF DE15®, DuPont 2610®, Sherwin-Williams PSE 4600 and NP70® and Martin-Semour 5120 and 5130® PPG DP90LF SPIES/ HECKER 3688/8590 - 3688/5150 - 4070/5090 STANDOX 11158/13320 - 14653/14980 products are approved for this application.
| 5.1. | Remove all traces of broken glass from the outer cowl panel, seats, floor and defroster ducts. |
| 5.2. | Clean around the edge of the inside surface of the window with a 50/50 mixture of isopropyl alcohol and water by volume on a dampened lint free cloth. |
Caution: When replacing stationary windows, use Urethane Adhesive Kit GM P/N 12346392 (Canadian P/N 10952983), or a urethane adhesive system meeting GM Specification GM3651G, to maintain original installation integrity. Failure to use the urethane adhesive kit will result in poor retention of the window which may allow unrestrained occupants to be ejected from the vehicle resulting in personal injury.
Caution: Failure to prep the area prior to the application of primer may cause insufficient bonding of urethane adhesive. Insufficient bonding of urethane adhesive may allow unrestrained occupants to be ejected from the vehicle resulting in personal injury.
Important: Do not apply the black #3 primer to the existing bead (1) of the urethane adhesive on the pinch-weld flange. Apply the primer only to nicks, scratches or the primed surfaces.
Notice: Do not use spacers when installing a windshield. The stress caused by the spacers may damage the windshield.
Important: When installing spacers (2) and/or blocks (3) space them equally around the quarter window, back window or the liftgate window (1) to aid in the height set, if equipped.
The acoustic strip aids in reducing noise.
Important: Use care when applying glass prep clear #1 on the window. This primer dries almost instantly, and may stain the viewing area of the window if not applied evenly.
Immediately wipe the glass primed area using a clean, lint-free cloth.
Important: The glass primer black #2 is effective up to 8 hours after applying it to the glass. The primed surface of the glass must be kept clean.
Important: Do not direct a hard stream of high pressure water to the freshly applied urethane adhesive.
Caution: Insufficient curing of urethane adhesive may allow unrestrained occupants
to be ejected from the vehicle resulting in personal injury.
• For the moisture-curing type of urethane adhesive, allow a minimum
of 6 hours at 21°C (70°F) or greater and with at least 30 percent
relative humidity. Allow at least 24 hours for the complete curing
of the urethane adhesive. • For the chemical-curing type of urethane adhesive, allow a minimum
of 1 hour .
| • | Partially lower a door window in order to prevent pressure buildups when closing doors before the urethane adhesive cures. |
| • | Do not drive the vehicle until the urethane adhesive is cured. Refer to the above curing times. |
| • | Do not use compressed air in order to dry the urethane adhesive. |
