Nylon Fuel Pipes

CAUTION: In order to Reduce the Risk of Fire and Personal Injury:
^ If nylon fuel pipes are nicked, scratched or damaged during installation, Do Not attempt to repair the sections of the nylon fuel pipes. Replace them.
^ When installing new fuel pipes, Do Not hammer directly on the fuel harness body clips as it may damage the nylon pipes resulting in a possible fuel leak.
^ Always cover nylon vapor pipes with a wet towel before using a torch near them. Also, never expose the vehicle to temperatures higher than 115°C (239°F) for more than one hour, or more than 90°C (194°F) for any extended period.
^ Before connecting fuel pipe fittings, always apply a few drops of clean engine oil to the male pipe ends. This will ensure proper reconnection and prevent a possible fuel leak. (During normal operation, the O-ring located in the female connector will swell and may prevent proper reconnection if not lubricated).

Nylon fuel pipes are designed to perform the same job as the steel or rubber fuel lines that they replace. The nylon pipes are constructed to withstand the maximum fuel system pressure, exposure to fuel additives and changes in temperature. There are two sizes used: 3/8 inch ID for the fuel feed, and 5/16 inch ID for the fuel return and are used on the modular sender. The nylon fuel pipes are somewhat flexible and can be formed around gradual turns However, if forced into sharp bends, the nylon pipes will kink and restrict the fuel flow. Also, once exposed to fuel, the nylon pipes may become stiffer and are more likely to kink if bent too far. Take special care when working on a vehicle with nylon pipes.