WIND NOISE CORRECTION LEAK DETECTOR USAGE

Models Affected: 1985 Electras

The following information is being provided to assist dealer persomel in the correction of windnoise comments on some 1985 Electras.

The vehicle may have to be roadtested to locate the windnoise. Useful tools in detecting the source of a windnoise are a powder gun, ultrasonic leak detector or a stethescope.

Figure 1 shows two areas that should be check for windnoise. The following pages contain items within those areas and procedures to correct windnoise.

Area 1 - Item 1

Center Pillar to Side Roof Rail - Joint not Fully Sealed (Figure 2)

1. Remove center pillar trim panel.

2. Loosen roof drip scalp molding and retainer.

3. Remove center pillar applique.

4. Carefully pull back roof drip scalp molding and retainer to access joint area.

5. Joint area may be resealed using 3M #08531 heavy drip check sealer,3M #08578 Strip Caulk (or equivalent). See Figure 2, View A.

6. Reinstall all previously removed items. Make sure that the center pillar applique mounting holes and opera lamp hole (if so equipped) are properly sealed prior to installation of the applique.

Area 1 - Item 2

Door Weatherstrip Installatim

The rear upper corner of the door wwatherstrip should conform to tbe contour of the door frame. It should not be seated forward or low (shown by broken line in Figure 3) , as this would increase the chance for marginal weatherstrip to body contact.

Area 1 - Item 3

The rear leg of the front door frame should contact the bumper on the lock pillar or center pillar garnish molding with the door in the closed position. Contact should not be so great to increase door closing efforts (see Fig. 4).

Area 1 - Item 4

The door weatherstrip should be sealed to the door assembly as indicated by the arrows in Figure 5. The weatherstrip should also be sealed to an area below the lock opening using 3M #08011 weatherstrip adhesive (or equivalent) as shown in Figure 5, View A.

Area 1 - Item 5

Rear Door Weatherstrips - Sedan Styles

Make sure that the weatherstrip on the rear door is properly installed and cemented to the door. Check weatherstrip contact to body surfaces to insure a good seal.

Area 2 - Item 1

Door frame to inner panel reinforcement areas (with mirror and "patch" removed) should be sealed with 3M #08578 Strip Caulk (or equivalent) as the shaded areas indicate in Figure 6, View A.

Area 2 - Item 2

Air Leaks at Front Inboard Leg of Run Charnnel to Glass

This item can be revised by installing a length of weatherstrip shim material to the cavity as shown in Figure 7. The material to be installed, Dominion Sure Seal, part number RRR 1/4 or equivalent, should be 155m (6 1/8") in length and installed 30mm (1 3/16") from the bottom edge of the run channel inboard leg. This material should be cemented into place using 3M #08011 Weatherstip Adhesive or equivalent.

Area 2 - Item 3

Door upper frame to inner panel seams should be sealed with 3M #08531 Heavy Drip Check Sealer (or equivalent), as indicated by the shaded area in Fig .8.

Area 2 - Item 4

Air leaks which have been determined to come from the windshield area can be resealed using part number 9636067 urethane adhesive (or equivalent). The lower corner of the windshield can be the source of noise and additional sealant should be applied in the area shown in Figure 9, View A.

Area 2 - Item 5

The door weatherstrip should be sealed to the door assembly as indicated by the arrows in Figure 10. The weatherstrip should also be sealed to an area even with the upper door using 3M #08011 Weatherstrip Adhesive (or equivalent) as shown in Figure 10, View A.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.