Removing Turbocharger For Cylinder Bank 4-6

→ Let hot components cool down.

→ Wear personal protective gear.

→ Let the fluid cool down.

→ Wear personal protective gear.

→ Avoid contact with caustic fluid.

→ Wear personal protective gear.

→ Ensure that there is good ventilation.

→ If you do come into contact, wash off immediately with plenty of warm water and contact a doctor if necessary.

→ Close off all openings immediately after exposing them (with adhesive tape, suitable stoppers).

Information 

Specifications for wrench sizes (a/f specifications) for screw heads are described as follows:

• Torx screws: (E..) for external Torx, (T..) for internal Torx. 
• Hexagon-head bolts (internal and external hexagon): Wrench size (a/f) 

1. Unscrew external Torx screw (E10, M6 x 12) -1-  on the holder for the turbocharger oil return line.
   1. 1.1. Unscrew external Torx screw (E10, M6 x 12) -2-  on the oil return line at the turbocharger oil tank and pull the line out of the oil tank.
   2. 1.2. Collect emerging fluid and close off the opening using a suitable stopper. 
   3. 1.3. Loosen M12 union nut (a/f 14) -3-  on the exhaust temperature sensor and pull out the sensor.
      Fig 1: Identifying Oil Return Line From Oil Tank To Turbocharger (View Of Cylinder Bank 4-6)

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2. Release and pull off cable plug -1-  on electronic adjuster.
   Fig 2: Pulling Off Cable Plug On Electronic Adjuster

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3. Unscrew external Torx screws (E10, M6 x 20) -1-  for the intake air line on the turbocharger.
   1. 3.1. Pull intake air line out of the turbocharger -horizontal arrow-  . Replace O-ring.
   2. 3.2. Press intake air line up out of the rubber mounting in the engine compartment -vertical arrow-  .
      Fig 3: Pressing Intake Air Line Up Out Of Rubber Mounting In Engine Compartment

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4. Remove connecting lines on the turbocharger and loosen fastening points for the lines.
   1. 4.1. Unscrew external Torx screws (E10, M6 x 12) on the holder for the vent line -3-  and coolant lines -4-  .
   2. 4.2. Unscrew external Torx screw (E10, M6 x 12) -1-  on the vent line at the turbocharger oil tank and pull the line out of the oil tank.
   3. 4.3. Loosen internal Torx screw (T30, M6 x 12) -2-  on the bottom coolant line and pull the line out of the turbocharger.
   4. 4.4. Collect emerging fluid and close off the openings using suitable stoppers. 
      Fig 4: Identifying Turbocharger Fastening Points

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5. Unscrew external Torx screw (E10, M6 x 12) -1-  on the oil pressure line holder.
   Fig 5: Identifying Oil Pressure Line Holder On Turbocharger

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6. Unscrew internal Torx screws (T30, M6 x 12) on the top coolant line -2-  and oil pressure line -1-  at the turbocharger and pull off the lines.
   Fig 6: Identifying Coolant Line And Oil Pressure Line On Turbocharger

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Replace all O-rings.
8. Unscrew three M8 collar nuts (a/f 12) on the exhaust manifold flange -arrows-  .
   1. 8.1. Replace collar nuts.
      Fig 7: Identifying Exhaust Manifold Flange On Cylinder Bank 4-6

      Courtesy of PORSCHE CARS NORTH AMERICA, INC.
9. Unscrew external Torx screw (E12, M8 x 16) -2-  on the turbocharger holder.

   Get another person to help to support the turbocharger. 

   Fig 8: Identifying Turbocharger Holder

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10. Pull the turbocharger outwards off the studs on the exhaust manifold flange and remove it.
11. Clean sealing faces on the turbocharger and exhaust manifold.
    1. 11.1. Clean studs (M8) with a wire brush and replace them if necessary.
    2. 11.2. Replace exhaust manifold flange seal.