Installing the flexible disc for the rear prop shaft

• Replace screws and self-locking nuts.

  Parts:  Self-locking nuts and bolts

• Install the flexible disk on the prop shaft and tighten the screws (arrows).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Flexible disc, rear, to prop shaft
  M12 Replace screws and nuts. Joining torque and angle of rotation must be observed without fail. Tightening via screw.	Joining torque	55 Nm
  	Angle of rotation	90°

  Courtesy of BMW OF NORTH AMERICA, INC.

• Central mount with the TOPPING designation: 

  Install central mount (1) into the transmission tunnel with the designation TOPPING facing upwards.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Position central mount.
• Position screws (1).

  Courtesy of BMW OF NORTH AMERICA, INC.

• Prop shafts with a narrow universal joint: 

  Use special tool 2 464 898 and a suitable tool (1) to protect the prop shaft (2) on the central universal joint from twisting.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Prop shafts with a wide universal joint: 

  Secure the prop shaft with a suitable tool (1) against twisting at the middle universal joint.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Assemble the three-hole flange (1), flexible disk (2) and the prop shaft (3) in the same position marked during removal.
• Replace screws.

  Parts:  Screws

• Tighten the screws.
  TIGHTENING TORQUE SPECIFICATION
  
  

  Rear flexible disc to three-hole flange
  M12 Replace screws. Joining torque and angle of rotation must be observed without fail. Tightening via screw.	Joining torque	55 Nm
  	Angle of rotation	90°

  Courtesy of BMW OF NORTH AMERICA, INC.

• Tighten down screws (1).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Central mount to body
  M8	Tightening torque	19 Nm

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Refer to INSTALLING THE HEAT SHIELD .
• Refer to INSTALLING THE COMPLETE EXHAUST SYSTEM .
• Refer to INSTALLING THE CONNECTING SUPPORTS ON THE TUNNEL .