Installing both exhaust manifolds

• Replace stud bolts (arrows).

  Parts:  Stud bolts

• Tighten stud bolts (arrows).
  TIGHTENING TORQUE SPECIFICATIONS
  
  

  Stud bolt on cylinder head
  M8x50 Replace the stud bolt.	tightening torque  20 Nm

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  NOTE: RISK OF DAMAGE 
  Damage to the surface  .
  The use of metal-cutting tools (e.g., emery cloths) for cleaning surfaces can damage them and lead to leaks and/or engine damage  .

  • Do not use any metal-cutting tools.
  NOTE: To provide a better overview: Illustration of surrounding parts removed.
• Clean the sealing surfaces (1) on the cylinder head using special tool 0 495 102 (11 4 470) .

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• Replace the seal (1).

  Parts:  Gasket

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• The installation position of the seal (1) must be adhered to  .

  The seal (1) must be installed with the side of the bead (2) (seal cavity) toward the exhaust manifold (3).

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• Insert and install the exhaust manifold (2).
• Position the sliding rail (1).

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  NOTE: TECHNICAL INFORMATION 
  When assembling, it is essential to observe screwing sequences and tightening torques.
  Failure to comply with the regulations can lead to leaks and damage.
• Replace nuts (1) to (8).

  Parts:  Nuts

• Tighten the nuts in sequence (1) to (8).
  Fig 1: Exhaust Manifold Nuts Tightening Sequence

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to INSTALLING FRONT HEAT SHIELD .
• Refer to INSTALLING ALTERNATOR .
• Refer to ATTACHING THE CHARGE AIR COOLER .
• Refer to INSTALLING THE RIGHT TANK VENT VALVE .
• Refer to INSTALLING LEFT TANK VENT VALVE .
• Refer to INSTALLING DRIVE BELT .
• Refer to INSTALLING THE COOLANT EXPANSION TANK FOR THE LOW-TEMPERATURE COOLANT CIRCUIT .
• Refer to INSERT THE EXHAUST TURBOCHARGER FOR THE CYLINDERS 5 TO 8 .
• Refer to INSTALLING THE EXHAUST TURBOCHARGER FOR THE CYLINDERS 1 TO 4 .
• Refer to INSTALLING THE INTAKE PIPE OF THE ENGINE VENTILATION LINE .
• Refer to INSTALLING LEFT CLEAN AIR PIPE .
• Refer to INSTALLING RIGHT CLEAN AIR PIPE .
• Refer to PARTIALLY INSTALLING LEFT ENGINE VENTILATION LINE .
• Refer to PARTIALLY INSTALLING THE RIGHT ENGINE VENTILATION LINE .
• Refer to CONNECTING THE RIGHT CHARGE AIR LINE TO THE EXHAUST TURBOCHARGER .
• Refer to CONNECTING THE LEFT CHARGE AIR LINE TO THE EXHAUST TURBOCHARGER .
• Refer to INSTALLING THE CARRIER PLATE .
• Refer to INSTALLING THE CATALYTIC CONVERTER OF CYLINDERS 5 TO 8 .
• Refer to INSTALLING THE RIGHT OXYGEN SENSOR MONITOR .
• Refer to INSTALLING THE LEFT OXYGEN SENSOR MONITOR .
• 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 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) .
• Refer to CONNECTING THE COOLANT HOSES TO THE HIGH-TEMPERATURE COOLANT RADIATOR .
• Refer to INSTALLING FAN COWL .
• Refer to INSTALLING THE REAR TOP CROSS CONNECTION .
• Refer to INSTALLING THE RIGHT AND LEFT UNFILTERED-AIR DUCT .
• Refer to INSTALLING BOTH INTAKE FILTER HOUSING .
• Refer to INSTALLING ACOUSTIC COVER .
• Refer to INSTALLING TENSION STRUT ON LEFT AND RIGHT SHOCK TOWER .
• Refer to INSTALLING UPPER CROSS CONNECTION .
• Refer to INSTALLING THE COVER IN THE ENGINE COMPARTMENT AT TOP LEFT , and INSTALLING THE COVER IN THE ENGINE COMPARTMENT ON THE TOP RIGHT .
• Refer to INSTALLING FRONT UNDERBODY PROTECTION .
• Refer to FILLING THE HIGH-TEMPERATURE COOLING SYSTEM WITH THE VACUUM FILLING EQUIPMENT .
• Refer to VENTING THE HIGH-TEMPERATURE COOLANT SYSTEM .