GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Windshield

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Bonded windshields require special tools and procedures to ensure the windshield will be removed without being broken. Also it may be very difficult to provide a quite windshield air seal or water tight seal. For this reason it is recommended you refer to a qualified technician.


CAUTION
If you work on any vehicle glass always wear eye protection and gloves, to reduce the risk of injury.

REMOVAL & INSTALLATION



When replacing the windshield, check for the reason it was damaged in the first place. The cause of the crack may be an obstruction or high spot around the flange. This could cause the replacement to crack, especially after temperature changes when the windshield needs to flex and can't.

When a windshield is broken, the glass may have already fallen or been removed from the weatherstripping. Other times, it is necessary to remove a cracked windshield that is still intact. In this case, it is a good idea to crisscross the glass with strips of tape before removing it; this will help hold the glass together and minimize the risk of injury.

If a crack extends to the edge of the glass, mark the point where the crack meets the weatherstrip. Later examine the window flange at this point for the possible cause of the windshield crack.

The higher temperature of the work area, the more pliable the weatherstrip will be. The more pliable the weatherstrip, the easier the windshield can be removed.

There are 2 methods of windshield removal, depending on the method of windshield replacement chosen. When using the short method of installation, it is important to cut the glass from the urethane adhesive as close to the glass as possible. This is due to the fact that the urethane adhesive will be used to provide a base for the replacement windshield. When using the extended method, all the urethane adhesive must be removed from the pinchweld flange so the process of cutting the window from the adhesive is less critical.

Removal

See Figures 1 and 2

The following procedure requires the use of a urethane glass sealant remover (hot knife) tool J-24709-1 or equivalent, and/or tool J-24402-A or equivalent.

  1. Place the protective covering around the area will the glass will be removed.
  2.  
  3. Remove the wiper arms, cowl vent grille, windshield supports, rear view mirror and the interior garnish moldings.
  4.  

If equipped with the radio antenna embedded in the windshield, disconnect the electrical connector at the base of the windshield.

  1. Remove the exterior reveal molding from the urethane adhesive by prying one end of the molding from the adhesive.
  2.  



Click image to see an enlarged view

Fig. Fig. 1: Remove the exterior reveal molding from the urethane adhesive by prying one end of the molding away from the adhesive


CAUTION
If you work on any vehicle glass always wear eye protection and gloves, to reduce the risk of injury.

  1. Using the urethane glass sealant remover (hot knife) J-24709 and the glass sealant remover tool J-24402-A or equivalents, cut the windshield from the urethane adhesive. If the short method of replacement is to be used, keep the knife as close to the glass as possible in order to leave a base for the replacement glass.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Using the urethane glass sealant remover (hot knife) J-24709-1 and the glass sealant remover tool J-24402-A, or equivalents, cut the windshield from the urethane adhesive. If the short method of replacement is to be used, keep the knife as close to the glass as possible, in order to leave a base for the replacement glass

  1. With the help of an assistant, remove the glass.
  2.  
  3. If the original glass is to be reinstalled, place it on a protected bench or make a holding device. Remove any remaining adhesive with a razor blade. Any remaining traces of adhesive material can be removed with denatured alcohol or lacquer thinner.
  4.  

DO NOT use any petroleum based solvents, this will prevent the adhesion of the new material. Don't allow solvents to contact the plastic or any non-glass areas to avoid discoloration.

Inspection

Inspect the opening for installation of the new glass. If there is no reason why known why the windshield broke, look carefully around the edges for any imperfections, then inspect the flange for any imperfections.

Check the replacement glass for chips or cracks. Small chips can be grounded off, restoring a smooth edge to the glass and minimizing concentrations of pressure that may cause breakage. Don't remove any more than necessary, you must maintain the original shape of the glass and the proper clearance between the glass and the flange opening. If not, leakage could occur. What a mess!

Short Method Installation

See Figure 3

  1. Using masking tape, apply the tape across the windshield pillar-to-windshield opening, then cut the tape and remove the windshield.
  2.  
  3. Using an alcohol dampened cloth, clean the metal flange surrounding the windshield opening. Allow the alcohol to air dry.
  4.  
  5. Using a pinchweld primer, found in the installation service kits, apply to the pinchweld area. Don't let any of the primer touch the exposed paint, it will damage the finish. Allow the primer to dry.
  6.  
  7. Cut the tip of the adhesive cartridge.
  8.  
  9. Apply adhesive first in and around the spacer blocks. Apply a smooth continuous bead into the gap between the glass edge and the sheet metal. Use a flat tool to paddle the material into position as necessary. Be sure the adhesive contacts the entire edge of the glass and extends to fill the gap between the glass and the solidified urethane base.
  10.  
  11. With aid from a helper, position the glass on the filler strips against the 2 support spacers.
  12.  



Click image to see an enlarged view

Fig. Fig. 3: With aid from a helper, position the glass on the filler strips against the 2 support spacers. After the windshield is in place, the vehicle must remain at room temperature for at least 6 hours. It cannot be driven during that time

The vehicle must remain at room temperature for at least 6 hours. It cannot be driven during that time.

  1. Spray a mist of water onto the urethane. Water will assist in the curing process. A mist, don't hose it down. Then dry the area where the reveal molding will contact the body glass.
  2.  
  3. Install new reveal moldings. Remove the protective tape covering the butyl adhesive on the underside of the molding. Push the molding caps onto each end of one of the reveal moldings. Press the lip of the molding into the urethane adhesive while holding it against the edge of the windshield. Take care to seat the moldings in the corners. The lip must fully contact the adhesive and the gap must be entirely covered by the crown of the molding. Slide the molding caps onto the adjacent moldings. Use tape to hold the molding in position until the adhesive cures.
  4.  
  5. Install the wiper arms, cowling and interior garnish moldings.
  6.  

Extended Method Installation

See Figures 4 and 5

  1. Using GM Strip Filler No. 20146247 or equivalent, install the sealing strip onto the pinchweld flange. The joint of the molding should be located a the bottom center of the molding.
  2.  
  3. Using masking tape, apply the tape across the windshield pillar-to-windshield opening, then cut the tape and remove the windshield.
  4.  
  5. Using an alcohol dampened cloth, clean the metal flange surrounding the windshield opening. Allow the alcohol to air dry.
  6.  
  7. Apply pinchweld primer, found in the installation service kits, to the pinchweld area. Don't let any of the primer touch the exposed paint, as it will damage the finish
  8.  



Click image to see an enlarged view

Fig. Fig. 4: Apply pinchweld primer, found in the installation service kits, to the pinchweld area. Don't let any of the primer touch the exposed paint, as it will damage the finish. Allow the primer to dry

  1. With aid from a helper, position the glass on the filler strips against the 2 support spacers.
  2.  
  3. Cut the tip of the adhesive cartridge 3 / 8 in. (10mm) from end of tip.
  4.  
  5. Apply adhesive first in and around the spacer blocks. Apply a smooth continuous bead into the gap between the glass edge and the sheet metal. Use a flat tool to paddle the material into position as necessary. Be sure the adhesive contacts the entire edge of the glass and extends to fill the gap between the glass and the solidified urethane base.
  6.  



Click image to see an enlarged view

Fig. Fig. 5: Apply a smooth, continuous bead of adhesive into the gap between the glass edge and the sheet metal, as well as around the perimeter of the glass

The vehicle must remain at room temperature for at least 6 hours. If cannot be driven during that time.

  1. Spray a mist of water onto the urethane. Water will assist in the curing process. A mist, don't hose it down. Then dry the area where the reveal molding will contact the body glass.
  2.  
  3. Install the reveal molding onto the windshield and remove the masking tape from the inner surface of the glass.
  4.  
  5. Press the lip of the molding into the urethane adhesive while holding it against the edge of the windshield. Take care to seat the molding in the corners. The lip must fully contact the adhesive and the gap must be entirely covered by the crown of the molding. Slide the molding caps onto the adjacent moldings. Use tape to hold the molding in position until the adhesive cures.
  6.  
  7. Install the wiper arms, cowling and interior garnish moldings.
  8.  

 
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