11 31 052 Replacing both timing chains (N63 hybrid)

Special tools required: 

• 00 2 300
• 11 2 001
• 11 2 002
• 11 2 003
• 11 2 007

Necessary preliminary tasks:

• Remove lower TIMING CASE COVER 
• To facilitate removal and installation of timing chains, turn engine over with special tool. 00 2 300

Timing drive, cylinders 1 to 4. 

Remove guide rail (5) from bearing bolt.

Remove timing chain (3) with tensioning rail (4) from bearing bolt.

Timing drive, cylinders 5 to 8. 

Remove guide rail (1) from bearing bolt.

Remove timing chain (2) with tensioning rail (6) from bearing bolt.

Fig 1: Identifying Bearing Bolt Tensioning Rail, Timing Chain And Guide Rails

Courtesy of BMW OF NORTH AMERICA, INC.

Timing drive, cylinders 1 to 4. 

Release bearing bolts (2) with a suitable tool.

Tightening torque: 11 31 1 AZ .

Timing drive, cylinders 5 to 8. 

Release bearing bolts (1).

Tightening torque: 11 31 2 AZ.

Fig 2: Identifying Bearing Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Attach special tools 11 2 001 and 11 2 002 to the crankshaft.

Insert special tool 11 2 007 and remove sprocket wheel with special tool 11 2 003 .

Installation: 

Check sprocket wheels for wear, replace if necessary.

Heat sprocket wheel to 60 °C. 

Fig 3: Removing Sprocket Wheel Using Special Tool (11 2 003)

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Make sure Woodruff key (1) is installed in correct position in crankshaft (2).

Fig 4: Identifying Crankshaft And Woodruff Key

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Maintain tension of timing chains when installing timing case cover.

Observe sparking protection on timing case cover.

Make sure timing chain (1) is correctly installed when placing it in guide rail (3).

Assemble engine.