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Home >> BMW >> 2012 >> Alpina B7L >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair - F01/F02 >> 1131 Camshaft >> 1131052 Replacing both timing chains (N63) >> Timing drive, cylinders 5 to 8

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 Guide Rail, Timing Chain And Tensioning Rail
G06888669Courtesy of BMW OF NORTH AMERICA, INC.


Release bearing bolts (1).

Tightening torque: 11 31 2AZ .

Fig 1: Identifying Bearing Bolts
G06888670Courtesy 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 note: 

Check sprocket wheels for wear, replace if necessary.

Heat sprocket wheel to 60°C. 

WARNING: Burning hazard! Wear gloves.
Fig 2: Removing Sprocket Wheel With Special Tool 11 2 003
G06888671Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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

Fig 3: Identifying Woodruff Key Installed In Correct Position In Crankshaft
G06888672Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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.