Body - A-Pillar Wind Noise
90cadillac08Bulletin No. T-90-78
File in Group 10
Number 176
Corp. Ref. No. 011515
Date June, 1990
SUBJECT: WIND NOISE FROM A-PILLAR AREA
MODELS AFFECTED: 1989-1990 DE VILLES AND FLEETWOODS
Some 1989-1990 DeVilles and Fleetwoods may have wind noise coming from the left or right hand A-pillar areas. To repair this condition first confirm there are no window, mirror, windshield, or weatherstrip leaks. Refer to bulletin T-89-46. The noise from air leaking into the A-pillar can usually be heard with a stethoscope at the front of the headliner.
To repair this condition fill the A-pillar with foam using the following procedure:
1. Remove the secondary weatherstrip from the pinch weld flange.
Figure 1 - Drill Hole For Foam Applicator Tube:
2. Drill a hole large enough for a foam applicator tube on each side of the pinch weld flange, about half way up the A-pillar, keeping them close enough to be covered by the secondary weatherstrip when it is reinstalled. Refer to Figure 1.
NOTE: On sunroof cars do not allow the drill to pass through the lower hole to the point where it traps,and pierces the sunroof drain hose.
3. Protect the area under the A-pillar as uncured foam will damage interior trim.
4. Fill the pillar with double-expanding polyurethane foam (available at building supply outlets) through both of the holes. First squirt a small amount of foam into a wastebasket to get an idea of how fast it comes out of the can and to make sure the foam expands properly. Keep in mind the volume dispensed will at least double after it expands. Putting too much in will cause the foam to ooze out. Have some acetone handy for clean up.
5. Cover each hole with enough thumb-grade sealer to stay in place. After the foam cures, the sealer can be removed or trimmed so it will be covered by the secondary weatherstrip.
6. Reinstall the secondary weatherstrip and road test the vehicle.
For warranty purposes use Labor Operation T6461 at .5 hour.