Procedure steps

• Vehicle handling
• Troubleshooting
• Function structure
• Power train
• Engine electronics
• Air supply
• Charge air system
• Wastegate valve

TECHNICAL INFORMATION 

The adjusting nuts must be locked using two open-end spanners. If only one open-end spanner is used, there is a risk of the electrical controller drive being damaged.

• Loosen lock nut (1)  .

  Remove wastegate valve linkage (3)  from the drive linkage.

  Unscrew adjusting nut (2)  .

  Fig 1: Identifying Wastegate Valve Linkage, Adjusting Nut, And Lock Nut

  Courtesy of BMW OF NORTH AMERICA, INC.

• Loosen screws (1)  .

  Remove the electrical controller drive (2)  .

  Fig 2: Identifying Electrical Controller Drive And Screws

  Courtesy of BMW OF NORTH AMERICA, INC.

• Schematic view shows the controller drive of the wastegate valve.

  Electric wastegate valve actuator (1)  on exhaust turbocharger.

  Adjusting nut (2) 

  Lock nut (3) 

  Wastegate valve linkage (4) 

  Fig 3: Identifying Wastegate Valve Actuator, Linkage, Adjusting Nut, And Lock Nut

  Courtesy of BMW OF NORTH AMERICA, INC.

• Position the electric wastegate valve actuator (2)  on exhaust turbocharger.

  Secure the electrical wastegate valve actuator with screws (1)  with the special tool 0 495 018 (11 4 350)  .

  TIGHTENING TORQUES SPECIFICATION
  
  

  Wastegate valve controller to exhaust turbocharger
  M4x12	2 ± 0, 3 Nm

  Fig 4: Identifying Electrical Controller Drive And Screws

  Courtesy of BMW OF NORTH AMERICA, INC.

TECHNICAL INFORMATION 

The adjusting nuts must be locked using two open-end spanners. If only one open-end spanner is used, there is a risk of the electrical controller drive being damaged.

• Screw in the adjusting nut (1)  on the electrical wastegate valve actuator until the limit position.

  Position the wastegate valve flap linkage on the electrical wastegate valve actuator (see arrow).

  Close flap linkage by hand, tighten adjusting nut (1)  on the linkage until it makes contact.

  Secure lock nut (2)  .

  Fig 5: Securing/Tightening Lock Nut And Adjusting Nut

  Courtesy of BMW OF NORTH AMERICA, INC.
  TIGHTENING TORQUES SPECIFICATION
  
  

  Lock nut on wastegate valve controller to exhaust turbocharger
  M6	5 ± 1 Nm

TECHNICAL INFORMATION 

The adjusting nuts must be locked using two open-end spanners. If only one open-end spanner is used, there is a risk of the electrical controller drive being damaged.

• Shorten adjustment travel (-).

  Increase adjustment travel (+).

  To ensure a reliable setting of the adjustment travel, both adjusting nuts must be marked with a colored mark.

  One full turn of the adjusting nut (2)  corresponds to an adjustment travel of 0.75 mm.

  Example 1: Actual value measured by the diagnostic function: 0.75 mm  .

  Fig 6: Adjusting Electrical Actuator Drive Nuts Using Open-End Spanners

  Courtesy of BMW OF NORTH AMERICA, INC.

  Required correction: +0.75 mm divided by 0.75 mm  = +1.0 revolutions.

  For the correction of the linkage setting, adjust the nut (1)  in the plus (+) direction by 1.0 revolution and then reset the nut (2)  with 6 Nm

  Example 2: Actual value measured by the diagnostic function: -1.5 mm  .

  Required correction: -1.5 mm divided by 0.75 mm  = -2.0 revolutions.

  For the correction of the linkage setting, adjust the nut (2)  in the minus (-) direction by 2.0 revolutions and then reset the nut (1)  with 5 Nm

  Check basic setting again through diagnosis.