11 31 052 Replacing Both Timing Chains (N62/N62TU)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, refer to ENGINE - SPECIAL TOOLS - 645CI .

Special Tools Required:

11 2 001
11 2 002
11 2 003
11 2 007

Necessary Preliminary Tasks:

Remove lower timing case cover, refer to 11 14 110 REMOVING AND INSTALLING BOTTOM TIMING CASE COVER (N62/N62TU) .

Remove timing chain (1).

Fig 1: Removing Timing Chains

Courtesy of BMW OF NORTH AMERICA, INC.

Remove timing chain (5).

Release screws (7).

Remove guide rails (3 and 6).

Remove tensioning rails (2 and 4).

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).

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

Fig 2: Removing Sprocket Wheel

Courtesy of BMW OF NORTH AMERICA, INC.

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.

WARNING: Burning hazard! Wear gloves.

Assemble engine.