Replace sealing ring
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 (3) on engine oil line.
Remove engine oil line (2).
Release screws (3) on vacuum reservoir (4).
Tightening torque 11 65 6AZ .
Remove vacuum reservoir (4).
Check VACUUM CONNECTIONS for correct routing.
Check VACUUM SYSTEM FOR LEAKS .
Assemble engine.