- Use a urethane adhesive systems which meet GM Specification GM 3651G
- Remove all mounds or loose pieces of urethane adhesive from the hood area.
- If the original window is being reused, remove all but approximately 2 mm (3/64 in) of the existing bead of urethane adhesive from the hood flange by using a clean utility knife or razor blade scraper.
- 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 hood flange.
- Allow the pinch-weld primer to dry for approximately 10 minutes.
- Dry fit the window to the hood opening in order to determine the correct position.
- Use masking tape in order to mark the locations of the window in the hood opening.
- Cut the masking in the center and remove the window from the hood 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.
- Apply a second coat of the glass prep clear #1 to the same area of the window.
- 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 6 mm (4.5 in) wide and 6 mm (4.5 in) high.
- Install the seal for the hood window opening.
- Use the inner edge of the hood window opening (1) as a guide for the nozzle (2) in order to apply the urethane adhesive (3) to the inner surface of the hood.
- Install the hood window (1) into the opening (2).
- Align the masking tape lines on the window and the body.
- Press the window firmly into hood.
- Tape the window to the hood in order to minimize movement until the urethane adhesive cures.
- Clean any excess urethane adhesive from the inner and outer panels of the hood.
- Use a soft spray of warm water in order to immediately water test the hood 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.
Warning: Refer to Eye Protection Warning in the Preface section.
Note: If replacing the hood window the seal must be replaced.
Warning: Refer to Failure to Prep Primer Warning in the Preface section.
Note: Do not apply the black #3 primer to the existing bead of the urethane adhesive on the hood 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 window 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 window must be kept clean.
Note: Ensure that the hood window is face down in the hood opening before installing. Use care when installing the hood window, the urethane adhesive has been applied at this time.
Note: Do not direct a hard stream of high pressure water to the freshly applied urethane adhesive.
| • | 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. |
