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11 31 051 Replacing timing chain (N54)

WARNING: This page is about a different car, the 2010 BMW X6, 2009 BMW X6, and 2008 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

See MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

See ENGINE - SPECIAL TOOLS (N54, N63) .

Necessary preliminary tasks: 

Remove fastener (1) in direction of arrow.

Installation: 

Install fastener (1) with bore facing outwards.

Fig 1: Identifying Fastener
G04751152Courtesy of BMW OF NORTH AMERICA, INC.

Secure engine in firing TDC position of cylinder no. 1 with special tool 11 0 300  .

Fig 2: Identifying Special Tool 11 0 300
G04751153Courtesy of BMW OF NORTH AMERICA, INC.

Mark flywheel and transmission housing with a line (1).

NOTE: Picture shows automatic transmission.
Fig 3: Identifying Flywheel And Transmission Housing Marking Line
G05501736Courtesy of BMW OF NORTH AMERICA, INC.

Do not  remove special tool 11 4 280  .

Fig 4: Identifying Special Tool 11 4 280
G04754926Courtesy of BMW OF NORTH AMERICA, INC.

Procedure, transmission removed. 

Secure flywheel (crankshaft) with special tool 11 9 260  .

Fig 5: Identifying Special Tool 11 9 260
G05501738Courtesy of BMW OF NORTH AMERICA, INC.

Secure flywheel (crankshaft) with special tool 11 8 660  to transmission.

Fig 6: Identifying Special Tool 11 8 660
G05501739Courtesy of BMW OF NORTH AMERICA, INC.

Mount special tool 11 8 180  on manual transmission with bolts (1).

Secure flywheel in direction of arrow.

Fig 7: Identifying Special Tool 11 8 180 And Manual Transmission Bolts
G05501740Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: To release central bolt (1), remove special tool 11 0 300  .

Release central bolt with a 3/4" socket (1) and if necessary with a 3/4" extension (2).

Tightening torque 11 21 1AZ  , see 11 21 CRANKSHAFT AND BEARINGS

Remove central bolt with hub towards front.

Fig 8: Identifying 3/4" Socket And A 3/4" Extension
G05501741Courtesy of BMW OF NORTH AMERICA, INC.

Open plug (1).

Tightening torque 11 31 6AZ  , see 11 31 CAMSHAFT

Fig 9: Identifying Plug
G04787034Courtesy of BMW OF NORTH AMERICA, INC.

Open plug (1).

Tightening torque 11 31 6AZ  , see 11 31 CAMSHAFT

Fig 10: Identifying Plug
G04787035Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on chain drive at top.

Tightening torque 11 31 2AZ  , see 11 31 CAMSHAFT

Fig 11: Identifying Screw On Chain Drive At Top
G04751182Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on chain drive at bottom.

Tightening torque 11 31 3AZ  , see 11 31 CAMSHAFT

Fig 12: Identifying Screw On Chain Drive At Bottom
G04751183Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 11 31 2AZ  , see 11 31 CAMSHAFT

Remove timing chain module with timing chain and sprocket wheel upwards in direction of arrow.

Fig 13: Identifying Screws
G04751185Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Note installation direction of sprocket wheel (2).
Collar (see arrow) on sprocket wheel (2) points to crankshaft. 
Incorrect assembly will result in engine damage. 
Fig 14: Identifying Sprocket Wheel
G04751186Courtesy of BMW OF NORTH AMERICA, INC.

Pull timing chain (1) upwards until sprocket wheel (2) engages chain guide (3).

Install timing chain (1) and sprocket wheel (2) in this position.

Installation: 

Always hold timing chain under tension.

Timing chain (1) may jam on chain module (3).

Fig 15: Identifying Timing Chain And Chain Module
G04751187Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: The N54 engine requires special friction plates between the friction surfaces.
The engine will incur damage if the friction plates are damaged or are not fitted.

Friction plates (1 and 2) are clipped into place on sprocket wheel/oil pump module.

Fig 16: Identifying Friction Plates
G04755026Courtesy of BMW OF NORTH AMERICA, INC.

Make sure friction plate (3) is in correct installation position.

Fig 17: Ensure Friction Plate (3) Is In Correct Installation Position
G05501750Courtesy of BMW OF NORTH AMERICA, INC.

Push on friction plate (1) without retainers.

IMPORTANT: The N54 engine requires special friction plates between the friction surfaces.
The engine will incur damage if the friction plates are damaged or are not fitted.
Fig 18: Push On Friction Plate (1) Without Retainers
G04755028Courtesy of BMW OF NORTH AMERICA, INC.

Insert chain module from above and secure with bolt (1).

Make sure gear wheels (2) are in correct installation position.

Insert hub (3) with friction plate.

Tightening torque 11 21 1AZ  , see 11 21 CRANKSHAFT AND BEARINGS

Fig 19: Identifying Bolt, Gear Wheels And Hub
G05501752Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 00 9 140  with magnet to engine carrier (1).

Fig 20: Identifying Special Tool 00 9 140 And Engine Carrier
G05501753Courtesy of BMW OF NORTH AMERICA, INC.

Secure central bolt with special tool 00 9 140  .

Fig 21: Securing Central Bolt With Special Tool 00 9 140
G05501754Courtesy of BMW OF NORTH AMERICA, INC.

Remove crankshaft radial seal   at front.

Install inlet and exhaust  adjustment units   .

Install chain  tensioner   .

Crank engine twice.

Check timing   .

Assemble engine.

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