11 65 300 Removing and installing/replacing the electrical actuator drive for the wastegate (N55)

Precondition: Coolant pump has been removed. For additional information, see REMOVING AND INSTALLING/REPLACING COOLANT PUMP (N55) .

CAUTION: RISK OF DAMAGE

Electrostatic discharge. Damage to or destruction of electrical components.

Leave the electrical components in their original packaging until they are being installed. Only use the original packaging for returning the product. Always package removed components straight away.
Read and comply with user information on using the associated special tool 12 7 060.
Only tap the housings of electrical components. Do not tap pins or multi-pin connectors directly.
Wear electrically conductive clothing and antistatic shoes (with ESD symbol).
For additional information see: NOTES ON ESD (ELECTROSTATIC DISCHARGE) .

Check function of DME
- Service functions
- Drive
- Engine electronics
- Adjustment programs
- Adjusting wastegate linkage
Wastegate valve controller
NOTE:
The adjustment nuts must be locked using 2 open-end wrenches. If only one open-end wrench 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, Lock And Adjusting Nuts
Courtesy of BMW OF NORTH AMERICA, INC.
Removing the wastegate valve controller
- Loosen screws (1).
- Remove the electrical controller drive (2).
Fig 2: Identifying Electrical Controller Drive And Screws
Courtesy of BMW OF NORTH AMERICA, INC.
1. View of the wastegate valve controller
  - Electrical wastegate valve controller (1) on the exhaust turbocharger.
    Adjusting nut (2)
    
    Lock nut (3)
    
    Wastegate valve linkage (4)
    
    Fig 3: Identifying Wastegate Valve Controller, Wastegate Valve Linkage And Nuts
    Courtesy of BMW OF NORTH AMERICA, INC.
Setting the wastegate valve controller to the basic setting
- Adjust the standard caliper gauge (3) to the dimension
  Dimension (A) = 26.6 mm
- Adjust the control rod (1) of the electrical wastegate valve controller (2) to the dimension (A).
Screwing on the wastegate valve actuator
- Position the electrical wastegate valve controller (2) on the exhaust turbocharger.
Secure the electrical wastegate valve controller with screws (1) using special tool 0 495 018 (11 4 350) .
WASTEGATE VALVE CONTROLLER AND EXHAUST TURBOCHARGER SCREWS TIGHTENING TORQUE SPECIFICATION

M4x12 2 ± 0.3 Nm

Fig 5: Identifying Electrical Controller Drive And Screws
Courtesy of BMW OF NORTH AMERICA, INC.
Attaching the wastegate linkage to the wastegate valve actuator
NOTE:
The adjustment nuts must be locked using 2 open-end wrenches. If only one open-end wrench 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 linkage in the direction of the arrow on the electric wastegate valve actuator.
- Close the adjusting lever by hand in the direction of the arrow.
- Position the adjustment nut (1) on the wastegate linkage.
- Tighten the lock nut (2).
Fig 6: Positioning Wastegate Linkage Onto Electrical Wastegate Valve Controller
Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque for lock nut on wastegate valve controller to exhaust turbocharger:

M6 6.6 ± 1 Nm