Camaro V6-3.8L VIN K (1995)
Fuel Return Line: Description and Operation
Nylon Fuel Pipes
FUEL FEED AND RETURN PIPES AND HOSES
The fuel feed pipe carries fuel from the fuel tank to the fuel rail assembly. The fuel return pipe carries fuel from the fuel rail assembly back to the
fuel tank. The fuel feed and return pipes consist of three sections:
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The rear fuel pipe assemblies are located from the top of the fuel tank to the chassis fuel pipes. The rear fuel pipes are constructed of nylon.
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The chassis fuel pipes are located under the vehicle and connect the rear fuel pipes to the engine compartment fuel pipes. These pipes are made
of steel.
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The engine compartment connecting fuel pipes connect the chassis pipes to the engine fuel rail. These pipes are routed from the chassis pipes
under the vehicle and behind the front drivers side wheel house liner to the engine compartment. The fuel pipes are made of nylon.
NYLON FUEL PIPES
Nylon fuel pipes are designed to perform the same job as the steel or flexible fuel pipes or hoses they replace. Nylon pipes are constructed to
withstand maximum fuel system pressure, exposure to fuel additives, and changes in temperature. There are two sizes used: 3/8" ID for the fuel
feed, and 5/16" ID for the fuel return.
The fuel feed and return pipes are assembled as a harness. Retaining clips hold the pipes together and provide a means for attaching the pipes to
the vehicle. Sections of the pipes that are exposed to chafing, high temperature or vibration are protected with heat resistant rubber hose and/or
corrugated plastic conduit.
Nylon fuel pipes are somewhat flexible and can be formed around gradual turns under the vehicle. However, if forced into sharp bends, nylon
pipes will kink and restrict fuel flow. Also, once exposed to fuel, nylon pipes may become stiffer and are more likely to kink if bent too far. Some
special care should be taken when working on a vehicle with nylon fuel pipes.
WARNING: To Reduce the Risk of Fire and Personal Injury:
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Always cover nylon fuel pipes with a wet towel before using a torch near them. Also, never expose the vehicle to temperatures higher then
115° C (239° F) for more than one hour, or more than 90° C (194° F) for any extended period.
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Take care not to nick or scratch the nylon fuel pipes. If damaged, they must be replaced.
