Roof - Drumming/Oil Canning Noise, Bows to Panel
89pontiac04Bulletin Number: 89-10-11
Reference Number: 931004
Publish Date: 2/89
Subject: OIL CANNING ROOF PANEL (DRUMMING) NOISE (SERVICE PROCEDURE TO APPLY INSULATION)
Models
Affected: 1989 6000 STATION WAGONS
Some 1989 6000 station wagons may have a gap between the roof bows and the roof panel which may result in a drumming/oil canning noise on some road surfaces. To eliminate this condition apply 3M (R) Foam Tape # 06307 or equivalent between roof bow and roof panel.
1. Remove headliner from vehicle (See Body Section, Service Manual 10-8).
2. Inspect roof bows to roof panel for adhesive sealer. Sealer should be present and contacting roof panel from side to side.
3. If adhesive sealer is not present or contacting roof panel, fabricate shim blocks (wood or other suitable material) large enough to slightly increase void space between roof bow and roof panel.(See Illustration).
4. Install shim blocks between bows and roof panel on both sides of bow (front and rear), slightly increasing space between roof bow and roof panel.
5. Cut strips of 3M (R) #06370 Scotchfoam Black Vinyl Foam Tape approximately four (4) inches long and attach to top of roof bows at four locations on each side of bows. Several lengths of foam tape will be required to completely fill space from roof bow to roof panel.
6. Remove shim blocks, foam tape should be compressed slightly between bow and roof panel.
7. Replace headliner.
Labor Operation Number : T1427
Labor Time : 1.4 Hour