Exhaust - Sulfur Odor
Bulletin 87-6F-1Date May '87
Ref.No. 87-107-6F
Corp. Ref. No. 706601
SUBJECT: EXHAUST SULFUR ODOR
MODELS AFFECTED: SOME 1986 AND EARLY BUILT 1987 SKYLARKS, SOMERSETS, CENTURYS, LESABRES, ELECTRAS, RIVIERAS AND TURBO REGALS EQUIPPED WITH 3.0L OR 3.8L ENGINES (VIN CODES L,3,B AND 7)
Some 1986 and early built 1987 models equipped with 3.0L or 3.8L engines and built prior to certain Vehicle Identification Number break points, may exhibit an occasional condition of a sulfur smell from the exhaust. This condition is more prevalent in city traffic or upon coming to a stop, and does not appear to affect fuel economy, driveability or emissions; however, in some cases, it may be a customer annoyance.
While high sulfur content fuels and rich air/fuel ratios both contribute to this condition, it may also be caused by a catalytic converter with reduced nickel levels in the base metal.
If this condition is experienced and cannot be repaired using currently published diagnostic and service information, it may be necessary to replace the catalytic converter with one of the applicable part numbers listed below.
Vehicles Involved
Certain 1986 and early built 1987 vehicles within the following serial numbers:
1986 & 1987 Models
Model Thru VIN Number Service Part Number
3.0L Somersets & Skylarks HM046427 25103328
3.0L LeSabres 1986 Only 25103335
3.8L Centurys HD426627 25103333
HT442206 25103333
H6404804 25103333
3.8L Turbo Regals HP420192 25103338
3.8L Electras/Park Avenues H1422870 25103335
3.8L LeSabres HH300140 25103335
3.8L Rivieras HU404222 25103335
Warranty Information
Labor Operation: T5141
Labor Hours: Use applicable time in Labor Time Guide
Trouble Code: 92