Trimming, Upholstery, Glass and Weatherstrip Fitting
Trimming, Upholstery, Glass and Weatherstrip Fitting
This domain covers interior trim, seat upholstery, headliners, glass installation and weather seals. The exam tests materials, fasteners, sealing and post-installation requirements.
Core rules
- Upholstery uses hog rings, clips, listing rods and adhesives. Replace torn foam and use the correct stretch direction on fabric.
- Headliners are fragile; support them during removal and use approved adhesive that withstands interior heat.
- Windshield and back glass installation typically uses urethane adhesive. Apply primer to the glass and body, maintain the specified bead profile and observe safe-drive-away time.
- Do not reuse cured urethane. Cut the old bead without damaging the pinchweld, then clean and prime.
- Weatherstrip must seat fully; check drain holes and water management.
- Vehicles with cameras behind the glass may need ADAS calibration after replacement.
Worked example
A windshield is replaced on a vehicle with a lane-departure camera. Reasoning: remove the old glass, clean and prime the pinchweld, apply the correct urethane bead, install the glass and set the safe-drive-away time. Then calibrate the camera according to the service procedure. Installing the glass without calibration leaves the safety system inaccurate.
Traps
Reusing urethane; cutting into the pinchweld; trapping water under weatherstrip; skipping ADAS calibration; stretching upholstery fabric across the wrong direction.
Key points
Use fresh urethane and correct glass primers. Maintain the bead profile and safe-drive-away time. Do not damage the pinchweld during glass removal. Weatherstrip must seat and drain correctly. Calibrate ADAS cameras after glass replacement when required.