Fuel Line Maintenance

Fuel Line Maintenance - Audi UrS Fuel Line Maintenance The...

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Audi UrS Fuel Line Maintenance The three under body fuel lines on the UrS cars run along the right side of the car and are held to the body by rubber mounts secured by stainless steel clips. The outer line is high-pressure fuel to the rail, the centre line is vapour, and the inner line is fuel return to the tank. Although the steel lines are well protected with a layer of copper plating covered by galvanizing covered by a green paint, the rubber mounts create a problem in rust belt cars. Salt from winter roads creeps under the rubber and is held against the fuel line, corroding the lines. These lines are now failing on the UrS4 cars and unless the mounts are removed and the lines cleaned and painted, a fuel leak is guaranteed somewhere down the road. I just did this repair on my ’94 S4 and have detailed the process below. Unfortunately this story has an unhappy ending – the return line began leaking one month after the repair, so I replaced all three lines. I should have done this maintenance two years ago.
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Fuel Line Maintenance - Audi UrS Fuel Line Maintenance The...

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