new car installations
Windshield Replacement for the
Chevrolet Impala DW 1377
by Steve Coyle
Always wear eye, hand and wrist protection while working on the vehicle. This vehicle is equipped with dual airbags and requires additional cure time before releasing to the owner. The Performance Achievement Group (PAG) recommends rapid curing, two-part, high viscosity urethane for
1. Getting started:
In preparation for the windshield replacement, complete the following steps: Grasp the stem of the breakaway style mirror and twist the assembly away from the glass. Disconnect the wires from the mirror and store the mirror in a safe location. Remove the plastic covers on the wiper arms with a small screwdriver to expose the retaining nut. Remove the nut and release the spring tension by lifting the blade to remove the wiper arm from the post.
Some wipers may be difficult to remove and may require a wiper arm tool. Remove the plastic cowl retainer on the passenger side of the cowl. Then remove the plastic push-in retainers by gently prying up on the Phillips head portion of the retainer. Remove the screws from the cowl panel and lift the one-piece cowl with the hood open.
The replacement glass includes a new moulding that wraps around the edge of the glass on three sides. Starting on the bottom of either side of the vehicle, remove the moulding by pulling up and away from the glass. Always be careful, especially with repainted vehicles, not to pull up any body paint during this process.
2. Removing the original windshield:
Cut the adhesive with a cold knife or power cutout tool on the top and sides of the glass. Cut the adhesive on the bottom with a power tool, as it does not follow the outside edge of the glass. Take special care not to damage the painted surface of the pinchweld.
3. Preparing for the new windshield:
We always recommend using the full cut out method. Using a sharp chisel, remove the adhesive, leaving a thin skin of well-bonded urethane on the pinchweld. Try not to disturb the body paint. Prime the pinchweld according to manufacturers specifications. Concentrate on areas of the paint that may contain scratches or other damage.
4. Placement of the new windshield:
The new glass will include a foam strip. Apply the foam strip to the bottom of the glass. With the new moulding applied, dry set the windshield and mark the proper position with a wax pencil, careful not to contaminate the primed surfaces. Apply suction cups to their proper position, remove the windshield from the opening and set it on the windshield stand with the outside facing down. Using a V-notch tip, apply adhesive along the inside edge of the moulding and directly below the reference mark on the bottom of the glass. Applying adhesive to the glass will assure proper contact. We always recommend advanced-curing, high viscosity urethane for passenger-side airbag equipped vehicles. Set the windshield into the opening using the dry set marks as guides. Once the glass contacts the pinchweld, use caution not to slide the glass. Apply slight pressure around the windshield perimeter.
5. Finishing touches:
Use a leak detector to assure a proper water and airtight seal. Replace the cowl, wipers and mirrors in reverse order of removal. Clean and detail vehicle, returning the vehicle to the owner in better condition than in which it was received.
Steve Coyle is part of the Perfor-mance Achievement Group, an auto glass training company in Madison, Wis.
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