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11 31 051 Replacing timing chain

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Special tools required: 

Necessary preliminary tasks: 

Remove fastener (1) in direction of arrow.

Installation note: 

Install fastener (1) with bore facing outwards.

Fig 1: Removing Fastener
G05501734Courtesy of BMW OF NORTH AMERICA, INC.

Secure engine in firing TDC position of 1st cylinder with special tool 11 0 300. 

Fig 2: Securing Engine In Firing TDC Position Of 1st Cylinder With Special Tool (11 0 300)
G05501735Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Illustration shows automatic transmission.
Fig 3: Identifying Flywheel And Transmission Housing Aligning Mark
G05501736Courtesy of BMW OF NORTH AMERICA, INC.

Do not  remove special tool 11 4 280. 

Fig 4: Identifying Special Tools (11 4 281) And (11 4 283)
G05501737Courtesy of BMW OF NORTH AMERICA, INC.

Procedure, transmission removed. 

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

Fig 5: Securing Flywheel (Crankshaft) With 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: Securing Flywheel (Crankshaft) With Special Tool To Transmission
G05501739Courtesy of BMW OF NORTH AMERICA, INC.

Mount special tool 11 8 180  on manual transmission with bolts (1) and secure flywheel in direction of arrow.

Fig 7: Mounting Special Tool (11 8 180) On Manual Transmission
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 .

Remove central bolt with hub towards front.

Fig 8: Releasing Central Bolt With Socket And Extension
G05501741Courtesy of BMW OF NORTH AMERICA, INC.

Open plug (1).

Tightening torque: 11 31 6AZ .

Fig 9: Identifying Plug
G05501742Courtesy of BMW OF NORTH AMERICA, INC.

Open plug (1).

Tightening torque: 11 31 6AZ .

Fig 10: Identifying Plug
G05501743Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on chain drive at top.

Tightening torque: 11 31 2AZ .

Fig 11: Identifying Screw On Chain Drive At Top
G05501744Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) on chain drive at bottom.

Tightening torque: 11 31 3AZ .

Fig 12: Identifying Screw On Chain Drive At Bottom
G05501745Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque: 11 31 2AZ .

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

Fig 13: Removing Timing Chain Module With Timing Chain And Sprocket Wheel
G05501746Courtesy 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: Locating Collar On Sprocket Wheel
G05501747Courtesy 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 note: 

Always keep timing chain tensioned; it is possible for timing chain (1) to jam on chain module (3).

Fig 15: Identifying Timing Chain, Sprocket Wheel And Chain Guide
G05501748Courtesy 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 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
G05501749Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 17: Identifying Correct Installation Position Of Friction Plate
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 plates are damaged or are not fitted.
Fig 18: Identifying Friction Plate Without Retainers
G05501751Courtesy 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 .

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: Securing Special Tool (00 9 140) With Magnet To 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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