Caprice Wagon RWD V8-305 5.0L (1991)
Nylon fuel lines are designed to perform the same function as the steel or rubber fuel lines they are replacing. Nylon lines are made to withstand
maximum fuel line pressure, exposure to fuel additives, and changes in weather. 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 lines are assembled and serviced as an assembly. Quick connect type fittings are used at the ends of the fuel
feed/return lines and at the in-line fuel filter.
Nylon fuel lines are somewhat flexible and can be formed around gradual turns under the vehicle. Nylon lines, if forced into sharp bends, will kink and
restrict fuel flow. Special care should be taken when working with nylon fuel lines. Nylon fuel lines cannot be repaired and can only be replaced with the
proper part number replacement.
QUICK CONNECT FITTINGS
Quick connect type fittings provide a simplified means of installing and connecting fuel system components. Two types of quick disconnect fittings are
used at various parts of the fuel system. O-rings, located inside the female socket provide the fuel seal. One type quick disconnect fitting uses hand
releasable locking tabs. The other type of quick disconnect fitting has a locking tab that requires the use of a special tool.
FUEL LINE O-RINGS
The fuel line O-rings used are made of Viton. They are brown in color. Viton is less affected than rubber by the additives used in many fuels. Therefore,
rubber should not be used.
