Piezoelectric Fuel Injectors, Removing And Installing: Notes

WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

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-