Install the right high-pressure rail

• Loosen screw (1).
• Slacken hold-down device (2).

  Courtesy of BMW OF NORTH AMERICA, INC.

  NOTE: TECHNICAL INFORMATION 
  Always install the high pressure line or rail free of distortion. To ensure distortion-free installation of the high pressure line and to avoid damaging the thread, it must be possible for both nuts to be screwed on to the injectors easily hand force.

  Courtesy of BMW OF NORTH AMERICA, INC.

• First insert the high-pressure rail at the high-pressure pump, then lower to the point where the ball heads are positioned inside the injector connections and the high-pressure rail is correctly positioned.
• Then tighten the nuts (1) on the injectors so they are hand-tight.
• Next, hand-tighten the nut (2) of the high pressure pump.
• Lastly, mount screws (3) and hand-tighten.
• Tighten down screws (3).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Rail on cylinder head cover
  M6X25	Tightening torque	10 Nm

• Tighten the screws (1) the hold-down device.
  TIGHTENING TORQUES SPECIFICATION
  
  

  Hold-down device to cylinder head
  M7	Tightening torque	13 Nm

• Tighten the nuts (2) on the injectors.

  Courtesy of BMW OF NORTH AMERICA, INC.

  TIGHTENING TORQUES SPECIFICATION
  
  

  Rail to injector
  M12	Joining torque	10 Nm
  	Tightening torque	23 Nm

• Tighten nut (3) on the high pressure pump.

Follow-up work 

• Refer to INSTALLING THE SOUND INSULATION ON THE RIGHT-HAND CYLINDER HEAD COVER .
• Refer to SECURE THE WIRING HARNESS ON THE CYLINDER HEAD COVER ON THE RIGHT .
• Refer to INSTALLING THE HOLDER FOR THE DIGITAL MOTOR ELECTRONICS CONTROL UNIT ON THE RIGHT .
• Refer to INSTALL THE INTEGRATED POWER SUPPLY MODULE (PDM) .
• Refer to INSTALLING THE DME CONTROL UNIT FOR CYLINDERS 1 TO 4 .
• Refer to CHECK THE COOLANT LEVEL IN THE LOW-TEMPERATURE COOLANT CIRCUIT AND TOP UP, IF NEEDED .
• Refer to INSTALL REAR UNDERBODY PROTECTION .
• Refer to INSTALL RIGHT CLEAN AIR PIPE .
• Refer to CONNECTING THE RIGHT CHARGE AIR LINE TO THE EXHAUST TURBOCHARGER
• Refer to INSTALLING THE RIGHT UNFILTERED-AIR DUCT .
• Refer to INSTALLING ALL IGNITION COILS ON THE RIGHT .
• Refer to INSTALLING INTAKE FILTER HOUSING .
• Refer to INSTALL ACOUSTIC COVER .
• Refer to INSTALL THE REAR TOP CROSS CONNECTION .
• Refer to INSTALL FRONT CROSS CONNECTION .
• Refer to INSTALLING FRONT-END STRUT ON LEFT AND RIGHT .
• Refer to INSTALLING THE COVER ON THE LEFT AND RIGHT IN THE ENGINE COMPARTMENT AT THE TOP
• Refer to DISCONNECTING ALL BATTERY GROUND LEADS .