Replace all sealing rings
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2014 BMW Alpina B7L, 2014 BMW Alpina B7, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
Release screw (1).
Tightening torque 11 53 3AZ .
Release banjo bolt (2).
Tightening torque 11 53 2AZ .
Lay coolant return line to one side.
Installation note: