11 31 505 Adjusting camshaft timing (N14)

Special tools required:

IMPORTANT: Modified procedure for timing setting.
The timing is not determined at firing TDC of cylinder no. 1.
All pistons are in the 90° position.
Check locking of adjusters.
To open the central bolt at the camshaft, grip hexagon head on rear of camshaft.
A reverse rotation of the engine is not permitted, test adjustment values will be distorted.

Necessary preliminary work:

Check TIMING .

IMPORTANT: Danger of mixing up dowel hole.
Balance hole and dowel hole can be mixed up; all pistons must be in the 90° position.
If necessary, determine by means of spark plug bore.

Fig 1: Securing Crankshaft Using Special Tool (11 9 590)

G04796154

Courtesy of BMW OF NORTH AMERICA, INC.

Rotate crankshaft at central bolt.

11 9 590 Slide in special tool in direction of arrow and block crankshaft.

A reverse rotation of the engine is not permitted, test adjustment values will be distorted.

IMPORTANT: Risk of damage! To chain drive.
To open central bolt, mount special tool on camshaft.11 9 551
If the setting gauges cannot be positioned, grip the camshaft with an open-end wrench to release the central bolt.

Fig 2: Opening Camshaft Central Bolt Using Special Tool (11 9 551)

G04789807

Courtesy of BMW OF NORTH AMERICA, INC.

Release special tool 11 9 340 .

Fig 3: Identifying Special Tool (11 9 340)

G04789835

Courtesy of BMW OF NORTH AMERICA, INC.

To open central bolts (3) on camshafts, install special tool 11 9 551 .

Release central bolts (3).

Tightening torque: 11 36 2AZ .

Fig 4: Identifying Camshaft Central Bolt

G04789812

Courtesy of BMW OF NORTH AMERICA, INC.

To open central bolts (3) on camshafts, install special tool 11 9 551 .

Release central bolts (3).

Tightening torque: 11 36 1AZ .

Fig 5: Identifying Camshaft Central Bolt

G04789813

Courtesy of BMW OF NORTH AMERICA, INC.

The designations for the intake camshaft (IN) and exhaust camshaft (EX) point upwards.

Both camshafts (intake and exhaust) have three machined surfaces to enable special tool 11 9 551 to be mounted.

The fourth surface is not machined and is crescent-shaped - it must point downwards.

Fig 6: Identifying Intake And Exhaust Camshafts

G04789816

Courtesy of BMW OF NORTH AMERICA, INC.

Position of exhaust camshaft (1) points at an angle to the right and inwards.

NOTE: Illustration does not show camshaft sprocket.

Fig 7: Positioning Of Exhaust Camshaft

G04789805

Courtesy of BMW OF NORTH AMERICA, INC.

Position of intake camshaft (1) points at an angle to the left and upwards.

NOTE: Illustration does not show VANOS unit.

Fig 8: Positioning Of Intake Camshaft

G04789817

Courtesy of BMW OF NORTH AMERICA, INC.

11 9 340 Screw special tool into cylinder head.

Pre-tension timing chain with special tool 00 9 250 to 0.6 Nm .

Fig 9: Identifying Special Tool (11 9 340)

G04796315

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Pre-tension intake camshaft with an open-end spanner clockwise to the right.

Secure central bolt (1) with special tool 00 9 120 or an electronic torque wrench.

Tightening torque: 11 36 1AZ .

Fig 10: Securing Intake Camshaft Central Bolt Using Special Tool (00 9 120)

G04789850

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Pre-tension exhaust camshaft with an open-end spanner clockwise to the right.

Secure central bolt (1) with special tool 00 9 120 or an electronic torque wrench.

Tightening torque: 11 36 2AZ .

Fig 11: Securing Exhaust Camshaft Central Bolt Using Special Tool (00 9 120)

G04789851

Courtesy of BMW OF NORTH AMERICA, INC.

Check TIMING .

Assemble engine.