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Home >> Audi >> 2009 >> Q7 4.2 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (3.0L - Turbocharger & Supercharger - Engine Code: CATA) >> 21 Turbocharger, Supercharger >> Turbocharger >> Turbocharger, Removing And Installing >> Removal

Turbocharger, Removing And Installing: Removal

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

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

  • Check the air filter housing, air filter element and air guide hoses for contamination.
  • Check the entire charge air circuit and charge air cooler for foreign objects.
  • If there are foreign objects in the charge air system, clean the charge air circuit and replace the charge air cooler if necessary.

-- Carefully pull the engine cover off the 4 bolts one after the other -arrows-.

Fig 1: Removing Engine Cover
GWWA10-11000Courtesy of AUDI OF AMERICA, LLC

-- Remove the air guide hose by loosening the hose clamps -arrows-.

Fig 2: Locating Spring Clamps
GWWA10-10495Courtesy of AUDI OF AMERICA, LLC

Vehicles through 05/2010: 

-- Remove the bolts -2- and -3-.

Fig 3: Right Side Air Guide Hose, Removing And Installing
GWWA21-10385Courtesy of AUDI OF AMERICA, LLC

-- Loosen the clamp -1- and remove the air guide hose from the right air guide pipe.

Vehicles from 06/2010: 

Fig 4: Removing Air Guide Hose From Right Air Guide Pipe
GWWA21-10027Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -2- and -3-.

-- Loosen the clamp -1- and remove the air guide hose from the right air guide pipe.

All vehicles: 

Fig 5: Identifying Air Intake Connector & Air Duct Hose
GWWA21-10018Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -left arrows- and move the air intake connection to the side with the air duct hose still connected -right arrow-.

-- Disconnect the connector -2- on the Turbocharger 1 Servo Motor -V280-.

Fig 6: Identifying Bolt -1- And Banjo Bolt -3- And Move Turbocharger Oil Supply Line To Side
GWWA21-10370Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -1- and banjo bolt -3- for the oil supply line on the turbocharger.

-- Remove the bolts -1- and -2- and then remove the heat shield from the turbocharger.

Fig 7: Identifying Bolts -1 To 2- And Turbocharger Heat Shield
GWWA21-10380Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows- and remove the primary catalytic converter from the turbocharger.

Fig 8: Identifying Front Exhaust Pipe With Catalytic Converter Nuts
GWWA26-10329Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the -1- Exhaust Gas Temperature Sensor 1 -G235- connector (black).

Fig 9: Identifying Connectors -1 And 2-
GWWA15-10650Courtesy of AUDI OF AMERICA, LLC
NOTE:

Ignore -item 2-.

-- Remove the turbocharger bolts -arrows-.

Fig 10: Locating Turbocharger Bolts
GWWA21-10226Courtesy of AUDI OF AMERICA, LLC
Fig 11: Identifying Turbocharger Components
GWWA21-10095Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Danger of damaging both pipes for the oil return line.

  • The upper part -3- of the oil return line mounted to the turbocharger must be removed carefully from the lower part -5- of the oil return line.
  • Gently turning the turbocharger -4- back and forth and pulling it up will prevent bending the oil return line pipes.
  1. O-Ring
  2. Intermediate Flange

-- Remove the turbocharger.

-- Seal any open lines and connections with a clean plug from the Engine Bung Set VAS 6122.

NOTE:

Do not set the removed turbocharger on top the upper part of the oil return line.