- Use a urethane adhesive systems which meet GM Specification GM 3651G
- Remove all mounds or loose pieces of urethane adhesive from the pinchweld area.
- If the original window is being reused, remove all but approximately 2 mm (0.078 in) of the existing bead of urethane adhesive from the pinchweld flange surface by using a clean utility knife or razor blade scraper.
- Inspect the pinchweld flange area for the cause of a broken window.
- After repairing the opening as indicated, perform the following steps:
- Verify all primers and urethane adhesive are within expiration dates.
- Shake the pinchweld primer (black #3) for at least 1 minute.
- Use a new dauber in order to apply the primer to the surface of the pinchweld flange (1).
- Allow the pinchweld primer to dry for approximately 10 minutes.
- With the aid of an assistant dry fit the window (3, 5) to the opening in order to determine the correct position.
- Ensure the locators (2, 4) are positioned into the locator slots on the lower pinchweld flange.
- Center the glass side to side into the body opening.
- Use masking tape (2) in order to mark the locations of the bodyside window in the opening.
- Cut the masking in the center and remove the bodyside window (3) from the opening.
- 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.
- 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.
- When applying around the radius edges of the window (2), measure a distance of 17-22 mm (0.669-0.866 in) inward, for the radius edges only.
- Cut the applicator nozzle in order to provide a bead of 10 mm (0.393 in) wide and 15 mm (0.590 in) high.
- Use a cartridge-type caulking gun in order to apply a smooth, continuous bead of urethane adhesive.
- Use the specifications as listed above to guide for the nozzle in order to apply the urethane adhesive (1) to the inner surface of the window.
- Position the window into the bodyside opening.
- Place the bodyside glass locators (2) onto the slots in the pinchweld flange.
- Align the masking tape on the bodyside window to the body (2) masking tape.
- Press around the entire periphery of the bodyside glass edge in order to wet-out the urethane adhesive bead.
- Tape the window to the body in order to minimize movement until the urethane adhesive cures.
- Clean any excess urethane adhesive from the body by using VMP Naptha.
- Clean any excess urethane adhesive from the interior trim by using acrysol.
- 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:
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Note: If corrosion of the pinchweld flange is present or if sheet metal repairs or replacements are required, the pinchweld 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 DE17®, 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 seats, floor and/or defroster ducts, if applicable. |
| 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. |
| 5.3. | Allow the isopropyl alcohol to dry completely before applying the primers. |
Warning: Refer to Window Retention Warning in the Preface section.
Warning: Refer to Failure to Prep Primer Warning in the Preface section.
Note: Do not apply the (black #3) primer to the existing bead (1) of the urethane adhesive on the pinchweld flange. Apply the primer only to nicks, scratches or the primed surfaces.
Note: 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.
Note: 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.
Note: Measure a distance of 14-17 mm (0.551- 0.669 in) inward, from the top, bottom and side edges of the window (1) in order to apply the urethane bead onto the window.
Use the measurements as a guide in order to apply the urethane adhesive bead to the blackout area of the window.
Note: The urethane adhesive bead must maintain a consistent height and width uniformity.
Note: The bodyside glass must be installed to the bodyside opening within 5 minutes after the urethane adhesive is dispensed.
Note: Do not direct a hard stream of high pressure water to the freshly applied urethane adhesive.
Warning: 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. |
