BMW workshop service disc says
Release temperature of the clutch nut 150 °C
and to tighten
Clutch cage to balancing shaft
M36 x 1.5, Replace nut, threads free of grease
Thread-locking compound (Micro-encapsulated)
1st tightening torque, 170 Nm
Slacken, nut, angle of rotation, 90°
2nd tightening torque, 250 Nm