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Home >> BMW >> 2014 >> 320i Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair - F30 (3 Of 4) >> Camshaft >> 11 31 505 Adjusting timing of camshaft(s) (N55)

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

Special tools required: 

IMPORTANT: For the positioning of the special tool 11 4 281 on the mounting flats of the intake camshaft, a collision with the cylinder throttle return spring 1 can occur.
Rework special tool 11 4 281 on the basis of the following DESCRIPTION .

Necessary preliminary tasks: 

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

Fig 1: Identifying Intake Camshaft
G04751154Courtesy 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 Cam Lobes Of Exhaust Camshaft
G09845250Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Identifying Part Numbers On Camshafts
G09845251Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Fit special tool 11 4 282 underneath on side of intake camshaft.

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

Mount special tool 11 4 281 on the exhaust camshaft.

Fig 4: Securing Special Tool (11 4 285) With Bolts
G09845252Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Only use special tool 11 4 280 to loosen central bolts (1 and 2) of VANOS unit.

Release central bolts (1 and 2).

Fig 5: Identifying VANOS Unit Central Bolts
G09845253Courtesy of BMW OF NORTH AMERICA, INC.

Release CHAIN TENSIONER  (1).

Fig 6: Identifying Chain Tensioner
G09845254Courtesy of BMW OF NORTH AMERICA, INC.

Tightening torque 11 31 7AZ .

IMPORTANT: Have a cleaning cloth ready. A small quantity of engine oil will emerge after the screw connection has been released.
Make sure no engine oil runs onto belt drive.

Installation note: 

Replace sealing ring.

Turn increment wheel (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 Increment Wheel
G04751201Courtesy 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°.

11 9 340 Screw special tool into cylinder head.

Fig 8: Replacing Central Bolts
G09845256Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 9: Installing Timing Chain With Special Tool (11 9 340)
G09845257Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque 11 36 1AZ .

Fig 10: Tightening Intake Adjuster Central Bolts Using Special Tool (00 9 120)
G09845258Courtesy 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 Using Special Tool (00 9 120)
G09845259Courtesy 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.

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