11 31 052 Replacing both timing chains (N62/N62TU)

Special tools required: 

• 11 2 001  . See ENGINE- SPECIAL TOOLS .
• 11 2 002 
• 11 2 003 
• 11 2 007 

Necessary preliminary tasks: 

• Remove lower timing case cover 

Remove timing chain (1).

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).

Fig 1: Identifying Timing Chain, Guide Rails And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Attach special tools 11 2 001  and 11 2 002  to 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 2: Identifying Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.