High Pressure Lines, Removing And Installing: Procedure

WARNING: This page is about a different car, the 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the sealing cones for deformities, cracks, damages, scratches or corrosion before reinstalling. Replace any damaged or corroded high pressure lines.

Check the line bores for deformities, narrowing or damage.

Make note of the installation position of the previous high pressure lines before reinstalling.

-- Remove any dirt from the sealing cone on the fuel rail.

-- Clean and dry the fuel line and the line head with engine or brake cleaner.

-- Coat the thread on the union nut with clean engine oil.

-- Hand-tighten the union nuts for the high-pressure lines evenly, making sure they are seated without tension.