Proper Installation of Nylon Fuel Pipe :

A case study was done to overcome the problem that can occur with the part of the fuel system. Nylon 11 tube also known as PA11 tube was used as the return pipe that was passing over the vehicle engine. This pipe was returning back the unused fuel to the fuel tank. Now, this pipe could also leak if any part of this nylon pipe comes into contact with hot engine manifold.

This is because of abrasion through the wall of the return pipe and not due to ozone cracking of the fuel pipe.