Removal Procedure
Tools Required
J 24402-A Glass Sealant
Remover (Cold Knife)
Caution: When replacing stationary windows, use Urethane Adhesive Kit GM P/N 12346392
(Canadian P/N 10952983), or a urethane adhesive system meeting GM Specification
GM3651G, to maintain original installation integrity. Failure to use the urethane
adhesive kit will result in poor retention of the window which may allow unrestrained
occupants to be ejected from the vehicle resulting in personal injury.
Caution: When working with any type of glass or sheet metal with exposed or rough
edges, wear approved safety glasses and gloves in order to reduce
the chance of personal injury.
Caution: At least 24 hours are required for complete curing of repair
material. The repair area should not be physically distrubed until after that
time. Insufficient curing of urethane adhesive may allow unrestrained occupants
to be ejected from the vehicle resulting in personal injury.
Caution: Failure to prep the area prior to the application of primer
may cause insufficient bonding of urethane adhesive. Insufficient bonding
of urethane adhesive may allow unrestrained occupants to be ejected from
the vehicle resulting in personal injury.
- Mask off the area around the rear window in order to protect painted
surfaces, the headliner, and aid in cleanup after installation.
- Remove the rear window reveal molding. Refer to
Rear Window Reveal Molding Replacement
.
- Disconnect the rear window
defogger left electrical connector.
- Disconnect the rear window
defogger right electrical connector.
- Using a razor or utility
knife, make a preliminary cut around perimeter of the rear window. Cut as
close to edge of the rear window as possible.
- Cut out the rear window
keeping the blade as close to edge of the rear window as possible using the J 24402-A
.
- With the aid of a helper,
use suction cups in order to lift the rear window from the opening.
- The following components may reveal the causes of a broken rear
window:
• | The flange of the rear window opening |
• | The rear window reveal molding |
- Look for any of the following conditions in order to prevent damage
to the rear window:
• | Hardened spot weld sealer |
• | Any obstruction or irregularity in the pinchweld flange |
- Inspect the condition of the rear window opening and the adhesive
bead in order to determine which installation method you will use. Refer to
Short Method Description
or
Extended Method Description
.
Important: If corrosion of the pinchweld flange is present, or if sheet metal repairs
or replacements are necessary, refinish the pinchweld flange in order to present
a clean primer only surface. If repairs to the paint are
required, mask the flange bonding area prior to the application
of the color coat in order to provide a clean primer
only surface. Use material such as BASF DE17®, DuPont
2610®, and PPG DP40®.
- After repairing the opening as indicated, perform the following steps:
- Thoroughly shake the primers that are provided in urethane adhesive
kit GM P/N 12346284, or an equivalent.
- Clean the rear window and pinchweld flange with a clean, dampened
cloth using GM Window Cleaner GM P/N 1050427, or isopropyl alcohol,
in order to clean the surface of the rear window and the pinchweld
flange of the excess urethane adhesive.
- Use a new dauber in order
to apply the pinchweld primer (Black #3) to the primed surface on the
pinchweld flange and to any exposed painted surfaces or
any scratches in the metal in the bonding area.
- Allow approximately 10 minutes drying time for the pinchweld
primer (Black #3).
Installation Procedure
- Install the new rear window
reveal molding.
Start from the center and hand press the rear window reveal molding
onto the rear window.
- With the aid of an assistant,
dry fit the rear window in the opening in order to determine the correct position.
- Use masking tape in order
to mark the location of the rear window in the opening.
- Slit the masking tape at the top edge of the rear window.
- With the aid of an assistant
remove the rear window.
- Place the rear window inside up on a clean, protected surface.
- If the you reuse the rear window, remove all but a thin film of
the existing urethane adhesive from the rear window surface, using a utility
knife or equivalent.
- Clean the surface of the rear window to which urethane adhesive
will be applied (around the edge of the inside surface) by wiping with a clean
cloth dampened with GM Window Cleaner GM P/N 1050427,
or isopropyl alcohol. Allow the surface to air dry.
- If the extended installation method is being performed:
9.1. | Remove all but a thin film of the existing bead of adhesive from
the pinchweld flange. |
9.2. | It is not necessary to remove all the traces of the urethane adhesive,
but there should not be any mounds or loose pieces of the urethane adhesive. |
9.3. | Thoroughly shake the pinchweld primer (#3 black). |
9.4. | Use a new dauber in order to apply the pinchweld primer (#3 black)
to exposed painted surfaces or scratches in the pinchweld flange in the bonding
area. |
9.5. | Allow approximately 10 minutes drying time for the pinchweld
primer (#3 black). |
Important: Use care when applying the windshield prep (#1 clear) in order
to prevent the windshield prep (#1 clear) from running into the vision
area of the rear window. This windshield prep (#1 clear)
may stain the view area of the rear window. This windshield
prep (#1 clear) dries almost instantly.
- Using a new dauber, apply
the windshield prep (#1 clear) to an area approximately 10-16 mm
(3/8-5/8 in) around the entire perimeter of
the rear window inner surface and to any exposed edges of
the rear window.
- Immediately wipe the primed area with a clean cloth.
- Thoroughly shake the windshield
primer (#2 black).
- Using a new dauber, apply the windshield primer (#2 black)
to the same areas where you applied the windshield prep (#1 clear).
- Allow approximately 6 minutes for drying the windshield
primer (#2 black).
- Prior to application of
the urethane adhesive, cut the tip of the applicator nozzle in order to provide
the following bead sizes:
• | For the short method, cut the tip in order to provide an adhesive
bead of approximately 4.5 mm (1/8-3/16 in). |
• | For the extended method, cut the tip in order to provide an adhesive
bead of approximately 14 mm (9/16 in). |
- Using a cartridge-type
caulking gun, apply a smooth continuous bead of urethane adhesive.
- When using the short installation method, apply the urethane adhesive
to the existing bead of urethane adhesive on the body.
- When using the extended
installation method, use the edge of the rear window or the inside edge of
the reveal molding as a guide for the nozzle.
- With the aid of an assistant,
use rubber suction cups in order to install the rear window in the opening.
- Align the tape on the
rear window and on the body.
- Press the rear window firmly into place in order to wet-out and
seat the urethane adhesive.
- Tape the rear window to
the body in order to minimize movement until the urethane adhesive cures.
- Remove any excess urethane adhesive.
Important: Warm or hot water accelerates the cure of the adhesive. Do not direct
a hard stream of high pressure water at the fresh urethane adhesive.
- Use a soft spray of warm water in order to immediately water test the
rear window.
- Inspect the rear window for leaks.
- If you found any leaks, use a plastic paddle in order to apply
extra urethane at the leak point.
- Complete the following steps in order to properly cure the urethane
adhesive:
• | Keep the vehicle at a room temperature of 22° C (72° F)
at 30 percent relative humidity. |
• | Allow a minimum of (6 hours) for the moisture curing urethane
adhesive. |
• | Allow a minimum of (1 to 1½ hours) for
the chemical curing urethane adhesive. |
• | Partially lower a door window in order to prevent pressure build-ups
when you close doors prior to the urethane adhesive cure. |
• | Do not drive the vehicle until the urethane adhesive is cured. |
• | Do not use compressed air in order to dry the urethane adhesive. |
- Remove the protective tape and the coverings from the rear window
area.
- Wipe the rear window area with a clean, dampened cloth using GM
Window Cleaner GM P/N 1050427 or isopropyl alcohol in order
to clean the surface of the rear window of the excess urethane
adhesive.
Allow to air dry.