Installing the catalytic converter of cylinders 5 to 8

• Replace seals on exhaust turbocharger.

  Parts:  Seals

• Guide in and install the catalytic converter (1) for cylinders 5 to 8 in the arrow direction.
• Connect the catalytic converter (1) for cylinders 5 to 8 to the exhaust turbocharger.

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• Guide in and install the catalytic converter (1) for cylinders 1 to 4 in the arrow direction.
• Connect the catalytic converter (1) for cylinders 1 to 4 to the exhaust gas turbocharger.

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• Replace clamps (1) and (2).

  Parts:  Clamps

• Mount clamps (1) and (2) and tighten.

  The circlips (1) and (2) must be mounted with the screw connection to the inside.

  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter to exhaust turbocharger
  cl Replace clamp after disassembly.	Tightening torque	14 Nm

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• Install holder (4).
• Tighten down screws (1).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter on cylinder head/cylinder head cover/holder
  M8x20	tightening torque	21 Nm

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• Tighten down screws (2).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter on cylinder head/cylinder head cover/holder
  M8x20	tightening torque	21 Nm

• Tighten down screw (3).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter on cylinder head/cylinder head cover/holder
  M8x20	tightening torque	21 Nm

• Install holder (4).
• Tighten down screws (1).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter on cylinder head/cylinder head cover/holder
  M8x20	tightening torque	21 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

• Tighten down screws (2).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter on cylinder head/cylinder head cover/holder
  M8x20	tightening torque	21 Nm

• Tighten down screw (3).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter on cylinder head/cylinder head cover/holder
  M8x20	tightening torque	21 Nm

• Feed in left heat shield (2) and connect to the other heat shields.
• Tighten top screw (1) heat shield.
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Heat protection plate
  M6x16	tightening torque	10 Nm

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• Connect heat shield (2) with the lower heat shield.
• Tighten bottom screw (1) heat shield.
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Heat protection plate
  M6x16	tightening torque	10 Nm

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• Thread in right heat shield (2) and connect with the other heat shield.
• Tighten top screw (1) heat shield.
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Heat protection plate
  M6x16	tightening torque	10 Nm

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• Connect heat shield (2) with the lower heat shield.
• Tighten bottom screw (1) heat shield.
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Heat protection plate
  M6x16	tightening torque	10 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

  Partially installing the catalytic converter for cylinders 5 to 8 

  WARNING: Hot exhaust system. 
  Risk of burning! 

  • Any work must exclusively be carried out with an exhaust system that has cooled down.
• Mount the catalytic converter for the cylinders 1 to 4 on the holder.
• Replace screws (1).

  Parts:  Screws

• Tighten down screws (1).

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• Mount the catalytic converter for cylinders 5 through 8 on the holder.
• Replace nuts (1).

  Parts:  Nuts

• Tighten nuts (1).

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• Feed in the thrust field (4) in the area (5) of the wheel arch trim panel and position it on the front subframe.
• Replace the bolts (arrows).

  Parts:  Screws

• Tighten screws (arrows).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Thrust field to front axle support
  M10 Replace screws.	Snug torque	56 Nm
  	Angle of rotation	90°

  Courtesy of BMW OF NORTH AMERICA, INC.

• Tighten down screws (3).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Cover, steering unit
  Thermoplastic hexagon screw	Tightening torque	2.6 Nm

• Tighten down screws (2).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Wheel arch cover
  Thermoplastic hexagon screw	Tightening torque	2.6 Nm
  Plastic nut	Tightening torque	2.6 Nm

• Tighten down screws (1).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Undershield/frame
  Hexagon screw	Tightening torque	3 Nm

Follow-up work 

• Refer to INSTALLING THE LEFT OXYGEN SENSOR MONITOR .
• Refer to REMOVING THE HOLDER FOR THE DME CONTROL UNIT ON THE LEFT .
• Refer to INSTALLING THE DME CONTROL UNIT OF CYLINDERS 5 TO 8 .
• Refer to INSTALLING COVER FOR THE LEFT DME CONTROL UNIT .
• Refer to INSTALLING THE LEFT UNFILTERED-AIR DUCT .
• Refer to INSTALLING TENSION STRUT ON SHOCK TOWER .
• Refer to INSTALLING HEAT SHIELD, TOP .
• Refer to INSTALLING THE LEFT INTAKE SILENCER BRACKET .
• Refer to INSTALLING THE LEFT LAMBDA OXYGEN SENSOR .
• Refer to INSTALLING THE RIGHT LAMBDA OXYGEN SENSOR .
• Refer to INSTALLING THE RIGHT INTAKE SILENCER HOUSING .
• Refer to INSTALLING LEFT INTAKE SILENCER HOUSING .
• Refer to INSTALLING ACOUSTIC COVER .
• Refer to INSTALLING EXHAUST SYSTEM .
• Refer to INSTALLING THE LEFT AND RIGHT REAR DIFFUSER .
• Refer to INSTALLING THE REAR LEFT AND RIGHT TENSION STRUT .
• Refer to INSTALLING THE LEFT AND RIGHT UNDERSHIELD (TANK COVER) .