11 74 509 Replacing both pressure converters for turbocharger (N63O1)

WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2018 BMW M6, 2018 BMW 650i xDrive, 2018 BMW 650i, 2018 BMW 640i xDrive, and 2018 BMW 640i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Remove right INTERCOOLER .

Pressure converter, cylinders 1-4:

Disconnect plug connection (1) on pressure converter.

Pressure converter, cylinders 5-8:

Disconnect plug connection (2) on pressure converter.

Fig 1: Identifying Pressure Converter Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Pressure converter, cylinders 1-4:

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

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

Unscrew nuts (1).

Tightening torque 11 65 9AZ .

Remove pressure converter (EDPDW).

Installation note:

Cylinder 1-4 is equipped with a fabric hose (OUT).

Fig 2: Identifying Pressure Converter (EDPDW) Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Pressure converter, cylinders 5-8:

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

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

Unscrew nuts (1).

Tightening torque 11 65 9AZ .

Remove pressure converter (EDPDW).

Installation note:

Cylinder 5-8 is equipped with a moulded hose (OUT).

Fig 3: Identifying Pressure Converter Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

All plug connections must audibly snap into place.

Check activation via diagnosis system.