WAVY OR DIMPLING APPEARANCE IN ROOF PANEL

SUBJECT: WAVY OR DIMPLING APPEARANCE IN ROOF PANEL RUNNING FRONT TO BACK OR EXCESSIVE RAIN NOISE (REPLACE CARDBOARD ROOF INSULATOR ADHESIVE)

MODELS: 1995-97 BUICK RIVIERA 1997 BUICK PARK AVENUE 1995-97 OLDSMOBILE AURORA

CONDITION:

SOME OWNERS MAY COMMENT ON A WAVY OR DIMPLING APPEARANCE IN THE ROOF PANEL RUNNING FRONT TO BACK OR EXCESSIVE RAIN NOISE.

CAUSE:

THE APPEARANCE CONDITION MAY BE CAUSED BY AN EXCESSIVE AMOUNT OF ADHESIVE ON THE CARDBOARD ROOF INSULATOR. THE EXCESSIVE RAIN NOISE MAY BE CAUSED BY AN INSUFFICIENT AMOUNT OF ADHESIVE ON THE CARDBOARD ROOF INSULATOR.

CORRECTION:

REMOVE THE HEADLINER AND REPLACE THE CARDBOARD ROOF INSULATOR ADHESIVE WITH THE PROPER AMOUNT.

IMPORTANT:

IT MAY BE NECESSARY TO REPLACE THE CARDBOARD ROOF INSULATOR IF IT IS DAMAGED IN THE REMOVAL PROCEDURE.

CARDBOARD ROOF INSULATOR -

REMOVAL OR DISCONNECT:

1. HEADLINER ASSEMBLY. REFER TO SECTION 10-9 OF THE SERVICE MANUAL.

2. CAREFULLY SEPARATE HEADLINER FROM CARDBOARD ROOF INSULATOR.

3. STARTING AT ONE CORNER OF CARDBOARD, PULLING DOWNWARD, CUT ADHESIVE BEAD USING A SHARP PUTTY KNIFE OR EQUIVALENT.

NOTICE:

- CARE SHOULD BE TAKEN NOT TO DAMAGE ROOF PANEL WHEN REMOVING OLD ADHESIVE.

- WHEN SERVICING VEHICLES WITH REAR VANITIES, BE SURE TO REMOVE THE REAR VANITIES BEFORE DROPPING THE HEADLINER. FAILURE TO REMOVE REAR VANITIES WILL CAUSE ROOF PANEL DAMAGE. ALSO, LEAVE THE BLACK REAR VANITY RETAINER GLUED TO THE ROOF. IF YOU MUST REMOVE THE RETAINER, BE VERY CAREFUL OR DAMAGE TO THE ROOF PANEL MAY OCCUR.

4. CUT OFF ALL OF THE ADHESIVE BEADS.

5. CARDBOARD INSULATOR.

IMPORTANT:

IT IS NOT NECESSARY TO REMOVE ALL OF THE OLD ADHESIVE.

INSTALL OR CONNECT:

1. APPLY 6 MM TO 9 MM (1/4 TO 11/32 INCH) BEADS OF ADHESIVE 15 MM (5/8 INCH) WIDE (FIGURE 1) WHERE IT WAS PREVIOUSLY REMOVED FROM CARDBOARD INSULATOR. WHEN A NEW CARDBOARD ROOF INSULATOR IS USED, PLACE ADHESIVE AS SHOWN IN FIGURE 2; THE ADHESIVE LOCATION IS MARKED ON THE CARDBOARD INSULATOR. BOTH THE BUICK/OLDSMOBILE G CAR AND BUICK C CAR USE FIVE BEADS OF ADHESIVE.

IMPORTANT:

USE BETAMATE URETHANE ADHESIVE, P/N 12378192, FOR THIS INSTALLATION.

2. PLACE CARDBOARD INSULATOR TO ROOF PANEL.

IMPORTANT:

ROOF INSULATOR MUST BE INSTALLED WITHIN FIVE MINUTES OF ADHESIVE APPLICATION.

3. HEADLINER.

IMPORTANT:

GLUING HEADLINER TO CARDBOARD ROOF INSULATOR IS NOT REQUIRED.

PARTS INFORMATION:

P/N 12378192 - BETAMATE URETHANE ADHESIVE

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION DESCRIPTION LABOR TIME ========= =========== ==========

C3108 HEADLINING ASSEMBLY - USE PUBLISHED R/R LABOR OPERATION TIME

ADD: TO REMOVE OLD CARDBOARD 0.7 HR AND INSTALL NEW PIECE OF CARDBOARD

FIGURES: 02 ATTACHMENTS: 00

FIGURE 2: 1. ADHESIVE BEADS 2. HEADLINER

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.

COPYRIGHT 1997 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.