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Home >> Audi >> 2017 >> RS 7 Base >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Turbocharger System (Service Information - 4.0L - CEUC, CRDB, CTGE, CWUB, CWUC) >> Turbocharger, Supercharger >> Turbocharger >> Turbocharger, Removing And Installing >> Removing

Turbocharger, Removing And Installing: Removing

NOTE:

Follow all the guidelines for clean working conditions. Refer to CLEAN WORKING CONDITIONS .

If mechanical damage (such as a destroyed compression wheel) is found on the turbocharger, just replacing the turbocharger is not enough. To avoid subsequent damage later, perform the following steps: 

Left Turbocharger 

-- Remove the housing for the charge air cooler. Refer to CHARGE AIR COOLER HOUSING, REMOVING AND INSTALLING .

Right Turbocharger 

-- Remove the right secondary air injection combination valve. Refer to COMBINATION VALVE, REMOVING AND INSTALLING .

Continued for Both Sides 

GWWA24-11124Courtesy of AUDI OF AMERICA, LLC

-- Remove the left and right front muffler. Refer to FRONT MUFFLER, REMOVING AND INSTALLING .

-- Remove the plenum chamber bulkhead. Refer to Bulkhead .

-- Remove the connectors from the bracket, disconnect them and then free up the wires.

1 - For Oxygen Sensor after Three Way Catalytic Converter -G130- -3-

4 - For Heated Oxygen Sensor -G39- -2-

-- Free up the wiring harness for the Heated Oxygen Sensor 2 -G108- and Oxygen Sensor 2 after Catalytic Converter -G131-.

NOTE:

The catalytic converter for the cylinder bank 1 (right) is on the left in the vehicle.

GWWA26-11198Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows- from the cylinder bank 1 (right) and then remove the catalytic converter in the left of the vehicle, toward the rear.

NOTE:

The catalytic converter for the cylinder bank 2 (left) is on the right in the vehicle.

GWWA26-11199Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows- from the cylinder bank 2 (left) and then remove the catalytic converter on the right in the vehicle, toward the rear.

-- Remove the bolts -1, 4, and 7-, then remove the retaining plates -2 and 6-.

GWWA21-10705Courtesy of AUDI OF AMERICA, LLC

-- Remove the coolant lines -3 and 5- from the left and right turbocharger.

-- Remove the bolts -1, 3- and then press the lower rear coolant pipe -2- toward the rear.

GWWA19-11468Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1, 2, and 3- and then remove the turbocharger support -4-.

GWWA21-10706Courtesy of AUDI OF AMERICA, LLC

-- Lift up the spring -2- with a small screwdriver and remove the actuator rod -3- from the ball studs to remove the turbocharger actuator rod in question -Item 22-  OVERVIEW - TURBOCHARGER.

GWWA55-10085Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the left and right connectors -1 and 2-.

GWWA21-10708Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows- and then remove the air guide pipe -1-.

GWWA21-10740Courtesy of AUDI OF AMERICA, LLC

Left Turbocharger: 

GWWA21-10707Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -arrow-.

-- Remove the bolts -1 and 3- and then remove the hose lines.

-- Loosen the hose clamps -2- to remove the oil return hose.

-- Remove the nuts in a -8 to 1- sequence and then remove the turbocharger.

Fig 1: Left Turbocharger Tightening Sequence
GWWA21-10603Courtesy of AUDI OF AMERICA, LLC

Right Turbocharger: 

GWWA21-10709Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -arrow-.

-- Remove the bolts -1 and 2- and then remove the hose lines.

-- Loosen the hose clamps -3- to remove the oil return hose.

-- Remove the nuts in a -8 to 1- sequence and then remove the turbocharger.

Fig 2: Right Turbocharger Tightening Sequence
GWWA21-10604Courtesy of AUDI OF AMERICA, LLC