11 14 122 Removing and installing/replacing timing case cover (W20)

Special tools required: 

• 11 4 470 

Preliminary work needed: 

• Remove drive unit (range extender). Refer to REMOVING AND INSTALLING COMPLETE DRIVE UNIT (RANGE EXTENDER) (I3 BASE, I3S) .
• Remove engine from drive unit. Refer to REMOVING AND INSTALLING ENGINE FROM DRIVE UNIT (I3 BASE, I3S) .

Installation note: 

Ventilation lines must be replaced after releasing.

Release ventilation line (1).

Remove COOLANT PUMP HOUSING (2) .

Unscrew screws (3 and 4).

Tightening torque 11 14 3 AND 4AZ .

Remove the timing case cover.

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Replace radial shaft seal (1).

Clean sealing surface (2) with special tool 11 4 470  .

Apply sealing bead with sealing compound 1.7 .

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Checking oil level:

• Park vehicle on a horizontal surface.

Service Function: 

1. Drive.
2. Range extender digital engine electronics.
3. Range extender service start.

Carry out leakage test for 20 min.