Fuel Line - O-Ring Composition & Replacement Precaution
BulletinNo. T 85-33 File In Group 6CNumber 93
Date Dec. '84
SUBJECT: FUEL LINE O-RINGS
MODELS AFFECTED: 1983-1985 CIMARRONS 1985 DEVILLE (FWD) AND FLEETWOOD EQUIPPED WITH 4.3L DIESEL 1985 DEVILLE (RWD), FLEETWOOD BROUGHAM, ELDORADO AND SEVILLE EQUIPPED WITH 5.7L DIESEL
The fuel line O-ring's (feed and return lines) used on the engine applications listed above are made of Viton. The O-rings (Viton is a type of rubber) are brown in color. They are less affected than other types of rubber by the additives used in many of the fuel blends available today and, therefore, should not be substituted with other type rubber O-rings. The following are the part numbers used on the above applications:
GROUP PART NO. USAGE
3.163 22514722 Feed Line
3.163 22516256 Return Line