Fuel - Line O Rings Precaution
Number: 85-12Section: 6C (VIII)
Date: Nov., 1984
Subject: FUEL LINE "O" RINGS
Model and Year: 1982-85 MODELS
TO: ALL CHEVROLET DEALERS
The fuel line "O" rings (feed and return lines) used on many 1982-85 engine applications are made of Viton. The Viton "O" rings (Viton is a type of rubber) are brown in color. They are less affected than 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 P/N Usage
3:163 22514722 Feed Line
3:163 22516256 Return Line