Wastegate Actuator: Service and Repair

11 74 509 Replacing both pressure converters for turbocharger (N63)





Necessary preliminary work:
^ Partially release charge air cooler expansion tank.
^ Partially release auxiliary water pump for exhaust turbocharger (not F04).
^ Disconnect plug connection at coolant thermostat.





Pressure converter, cylinders 1-4:
Disconnect plug connection (1) on pressure converter.

Installation note:
Plug connection (1) must snap audibly into place!

Disconnect black vacuum hose at connection (VAC = vacuum reservoir).

Disconnect black/red vacuum hose at connection (OUT= turbocharger vacuum unit).

Unscrew nuts (2).

Tightening torque 11 65 8AZ.

Remove pressure converter.





Pressure converter, cylinders 5-8:
Disconnect plug connection (1) on pressure converter.

Installation note:
Plug connection (1) must snap audibly into place!

Disconnect black vacuum hose at connection (VAC = vacuum reservoir).

Disconnect black/blue vacuum hose at connection (OUT= turbocharger vacuum unit).

Unscrew nuts (2).

Tightening torque 11 65 8AZ.

Remove pressure converter.





Check activation via BMW diagnosis system.