Installing the catalytic converter for cylinders 1 to 4

• Replace gasket on exhaust turbocharger.

  Parts:  Gasket

• 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.

  Courtesy of BMW OF NORTH AMERICA, INC.

• If necessary, replace clamp (1)  .

  Parts:  cl

• Mount and tighten clamp (1)  .

  The circlip must be mounted with the screw connection on the inside.

  TIGHTENING TORQUE SPECIFICATIONS
  
  

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

  Courtesy of BMW OF NORTH AMERICA, INC.

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

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

• Tighten down screws (2)  .
  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 screw (3)  .
  TIGHTENING TORQUE SPECIFICATIONS
  
  

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

• Mount the catalytic converter for the cylinders 1 to 4 on the holder.
• Replace nuts (1)  .

  Parts:  Nuts

• Tighten nuts (1)  .
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Catalytic converter to holder
  M8 Nut Replace nut.	Tightening torque	23 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to ALIGNING THE VACUUM PUMP FOR THE CAMSHAFT .
• Refer to REPLACING THE O-RING OF THE VACUUM PUMP .
• Refer to INSTALLING THE VACUUM PUMP .
• Refer to BENDING THE HEAT SHIELD TO THE FRONT .
• Refer to INSTALLING RIGHT HEAT SHIELD .
• Refer to TIGHTENING SCREW BETWEEN THE LEFT AND RIGHT HEAT SHIELD .
• Refer to INSTALLING HEAT SHIELD, TOP .
• Refer to INSTALLING ENGINE VENTILATION LINE .
• Refer to INSTALLING THE LAMBDA OXYGEN SENSOR AND THE MONITORING OXYGEN SENSOR FOR CYLINDERS 1 TO 4 .
• Refer to INSTALLING THE LAMBDA OXYGEN SENSOR AND THE MONITORING OXYGEN SENSOR FOR CYLINDERS 5 TO 8 .
• Refer to INSTALLING THE CENTER COWL UPPER PART .
• Refer to INSTALLING TENSION STRUT ON SHOCK TOWER .
• Refer to INSTALLING WINDSHIELD PANEL COVER .
• Refer to INSTALLING LEFT AND RIGHT WIPER ARM .
• Refer to INSTALLING THE REAR RIGHT ENGINE COMPARTMENT COVER .
• Refer to INSTALLING THE COVER OF THE ENGINE COMPARTMENT ON THE REAR LEFT .
• Refer to INSTALLING THE FRONT HOOD SEAL AT THE REAR .
• Refer to INSTALLING INTAKE FILTER HOUSING .
• Refer to INSTALLING ACOUSTIC COVER .
• Refer to INSTALLING EXHAUST SYSTEM .
• Refer to INSTALLING THE REAR AXLE COVER .
• Refer to IF INSTALLED: INSTALLING THE TORSION STRUT ON THE RIGHT, AND ON THE LEFT WHERE REQUIRED .
• Refer to INSTALLING THE CONNECTING SUPPORTS ON THE TUNNEL .
• Refer to INSTALLING THE REAR DIFFUSER .