11 31 505 Adjusting timing of camshaft(s) (N55)

Special tools required: 

• 00 9 120 .
• 00 9 250
• 11 4 280 .
• 11 4 281 .
• 11 4 282 .
• 11 4 285 .
• 11 4 290 .
• 11 9 340 .

Necessary preliminary tasks: 

• Remove CYLINDER HEAD COVER .
• Check TIMING .

With 1st cylinder in TDC firing position, cams of intake camshaft (1) at 1st cylinder point upwards at an angle.

Fig 1: Identifying Position Of Intake Cams With Cylinder 1 At TDC

Courtesy of BMW OF NORTH AMERICA, INC.

With 1st cylinder in TDC firing position, cams of the exhaust camshaft (1) point upwards at an angle.

Fig 2: Identifying Position Of Exhaust Cams With Cylinder 1 At TDC

Courtesy of BMW OF NORTH AMERICA, INC.

Part numbers (2) on intake and exhaust camshafts (1) point upwards.

Fig 3: Locating Camshaft Designation

Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 4 285 with bolts (1) to cylinder head.

Mount reworked special tool 11 4 281 on the intake camshaft.

Mount special tool 11 4 281 on the exhaust camshaft.

Fig 4: Mounting Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Release central bolts (1 and 2).

Fig 5: Identifying Central Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Release CHAIN TENSIONER  (1).

Tightening torque 11 31 7AZ .

Installation note: 

Replace sealing ring.

Fig 6: Identifying Chain Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

Turn sensor gears (2) in direction of arrow until retaining pins (1) on special tool 11 4 290 match up.

11 4 290 Slide on special tool in direction of arrow.

Fig 7: Turning Sensor Gears Until Locating Pins On Special Tool Match Up

Courtesy of BMW OF NORTH AMERICA, INC.

Use bolts to fasten special tool 11 4 290 .

Installation note: 

Replace both central bolts.

Screw in both central bolts.

Release both central bolts 90°.

Screw special tool 11 9 340 into cylinder head.

Fig 8: Fitting Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Pretension timing chain with special tool 11 9 340 00 9 250 0, 6 Nm 

Fig 9: Pretensioning Timing Chain Using Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool 00 9 120 to tighten central bolts of intake camshaft adjuster.

Tightening torque 11 36 1AZ .

Fig 10: Tightening Central Bolts Of Intake Camshaft Adjuster

Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool 00 9 120 to tighten central bolts of exhaust camshaft adjuster.

Tightening torque 11 36 1AZ .

Fig 11: Tightening Central Bolts Of Exhaust Camshaft Adjuster

Courtesy of BMW OF NORTH AMERICA, INC.

Remove all special tools.

Crank engine on the central bolt twice in the direction of engine rotation and check the TIMING .

Assemble engine.