Wastegate Actuator: Service and Repair

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





Necessary preliminary tasks:
^ Partially release intercooler expansion tank
^ Partially release auxiliary coolant pump for turbocharger
^ Disconnect plug connection on coolant thermostat





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

Installation:
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:
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.