CRACKS IN FLOOR PAN AT RIGHT REAR SEAT ADJUSTER-SER. PROC.

SUBJECT: CRACKS IN FLOOR PAN AT RIGHT (SERVICE PROCEDURE)

VEHICLES AFFECTED: 1986-89 'B' CAR W/SPECIAL EQUIPMENT OPTION

CONDITION:

----------- Some 1986 to 1989 B cars (police or taxi) with Special Equipment Option may have cracks in the floor pan at the right rear seat adjuster attachment of the driver's seat.

CORRECTION:

----------- This condition can be repaired using the following procedure:

1. Remove the driver's seat assembly, floor covering, seat belt (buckle side) and any other trim as required to expose damaged area.

2. Remove any sound deadener (sealer, etc.) from damaged area.

3. Cover all interior trim with fire blankets to prevent damage from welding sparks.

CAUTION:

A FUME EXTRACTOR SYSTEM (FAN, ETC) SHOULD BE USED WHILE WELDING.

4. Weld the existing crack(s) in the floor pan using MIG or equivalent welding method.

5. Obtain and fabricate a steel patching plate as indicated in Figure 1.

6. Place the plate over the seat attachment area, and fit to match the floor pan contour.

7. Remove fitted plate and dress and prep plate and floor pan area. Apply a coat of two component self etching weld through primer to floor pan and back of steel plate.

8. Secure the steel plate to the floor pan using either one inch MIG welds with one inch spacings or equivalent welding method. Refer to Figure 2

9. Plug weld the three (3) holes to the floor pan using MIG or equivalent welding method. Refer to Figure 2

10. Protect and seal both the underside and the inside of the repair area with a coat of self etching, two component primer (followed with a coat of rubberized undercoating on the underside only).

11. Reinstall floor covering, seat assembly and any other trim material removed.

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.