Camaro V6-173 2.8L (1983)
Fuel Return Line: Technical Service Bulletins
Fuel Line Knock
Number:
83-T-54
Section:
VI & VIII
Date:
June, 1983
Subject:
FUEL LINE KNOCK - 1982-83 "A" AND "X" CARS WITH 2.8L V6 ENGINE
TO:
ALL CHEVROLET DEALERS
Some 1982 and 1983 "A" and "X" cars with 2.8L V6 engines may exhibit fuel line knock when cold. The noise is usually heard inside the
car, and is more pronounced when the vehicle is cold but may still be present after vehicle reaches operating temperature. In most cases,
the noise can be temporarily eliminated by pinching off the fuel pump return flex hose.
To alleviate this condition, install thermal disc, PIN 14077716, in the fuel return line. The thermal disc shuts the return line in ambients
below 60~ (15.5~C) and when open has a restrictor orifice of 1.5 mm. The valve is marked for directional flow, tank towards tank and
pump towards fuel pump.
