Piezoelectric Fuel Injectors, Removing And Installing: Notes

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Cleaning SetVAS6811
Torque Wrench 1331 5-50NmVAG1331
Torque Wrench 1331 Insert - Reversible RatchetVAG1331/1
Torque Wrench 1331 Insert - Open Jaw - 17mmVAG1331/6
Union Nut SocketT40055
Puller - Unit InjectorT10055 with Puller - Unit Injector - Adapter 1T10055/1
O-Ring Assembly SleeveT10377

Removing

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

NOTE:

The following describes removing and installing the fuel injectors in cylinder bank 2 (left). The procedure on the opposite side is identical except for a few steps.

It is necessary to remove the air guide hose and the air filter housing upper section to remove and install the fuel injectors in cylinder bank 1 (right).

It is necessary to remove the fuel filter to remove and install the 5th and 6th fuel injectors in cylinder bank 2 (left).

WARNING:

Follow the guidelines for a clean working environment when working on the fuel system. Refer to CLEAN WORKING CONDITIONS AND FUEL SYSTEM WORK INSTRUCTIONS .
Always follow these rules before and during work.

CAUTION:

Mark the allocation of the injectors to the cylinder. They must always be re-installed on the same cylinder.
Always seal any open connections with a suitable cover.

-- Disconnect the return line connection on the injector by pressing both tabs downward and pulling the center piece at the same time upward in direction of -arrows-.

Fig 1: Identifying Center Piece On Retaining Strap

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Maintain clean working conditions. Dirt and contaminants must not enter the return lines and the connections on the fuel injectors.

-- Disconnect the connector on the injector to be removed.

-- Loosen the union nuts from the high pressure lines -1 through 6-.

Fig 2: Identifying High Pressure Line Union Nuts -1 Through 6-

Courtesy of AUDI OF AMERICA, LLC

-- Remove high pressure lines.

NOTE:

It is necessary to remove the air guide hose and the air filter housing upper section to remove and install the fuel injectors in cylinder bank 1 (right).

It is necessary to remove the fuel filter to remove and install the 5th and 6th fuel injectors in cylinder bank 2 (left).

The Following Step is Only Necessary for Removing Fuel Injectors 5 and 6

-- Remove the bolts -1 and 2- and nuts -4- from the fuel filter.

Fig 3: Identifying Bolts -1 & 2-, Fuel Hose -3 & 5-, Fuel Supply Hose -6- And Nut -4-