If A Used Fuel Injector Is Installed

-- Spray the tip of the fuel injector with a rust removing spray. Remove the rust or oil particles with a rag after approximately 5 minutes.

-- To remove the used copper sealing ring from the fuel injector, clamp the sealing ring carefully in a vise until the clamping jaws on the vise prevent the ring from turning. Pull the fuel injector out of the copper sealing ring by hand with slight twisting and pulling motions.

-- Use a scraper to remove any deposits under the copper sealing ring.

-- Install the new copper ring seal.

-- Replace the fuel injector shaft O-ring using the O-Ring Assembly SleeveT10377.

Fig 1: Guide Sleeve T10377 To Replace Fuel Injector Shaft Seal

Courtesy of AUDI OF AMERICA, LLC

-- Carefully slide the lubricated O-ring onto the fuel return line connection to prevent damaging it.