11 31 505 Adjusting camshaft timing (N14)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: Modified procedure for timing adjustment.

The timing is not determined at firing TDC of cylinder no. 1.

All pistons are in the 90° position.

Check locking of adjustment units.

To open the central bolt at the camshaft, grip hexagon on rear of camshaft.

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

Necessary preliminary tasks:

Check timing .

IMPORTANT: Danger of mixing up special tool bore.

Balance hole and special tool bore can be mixed up; all pistons must be in the 90° position.

If necessary, determine by means of spark plug bore.

Rotate crankshaft at central bolt.

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

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

Fig 1: Identifying Special Tool (11 9 590)

G04796154

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage! to chain drive.

To open central bolt, mount special tool 11 9 551 on camshaft.

If the setting gauges cannot be positioned, grip the camshaft with an open-end wrench to release the central bolt.

Fig 2: Mounting Special Tool (11 9 551) On Camshaft

G04789807

Courtesy of BMW OF NORTH AMERICA, INC.

Release special tool 11 9 340.

Fig 3: Identifying Special Tool (11 9 340) Into Cylinder Head

G04796315

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), mount special tool 11 9 551 on camshafts.

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 inlet camshaft (IN) and exhaust camshaft (EX) point upwards.

Both camshafts (inlet 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 Designations For Inlet Camshaft (IN) And Exhaust Camshaft (EX)

G04789816

Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Picture shows sprocket wheel removed.

Fig 7: Identifying 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: Picture shows VANOS adjustment unit removed.

Fig 8: Identifying Inlet Camshaft

G04789817

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 11 9 340 into cylinder head.

Pretension timing chain with special tool 00 9 250 to 0.6 Nm .

Fig 9: Installing Special Tool (11 9 340) Into Cylinder Head

G04796315

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque: 11 36 1AZ .

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

G04789850

Courtesy of BMW OF NORTH AMERICA, INC.

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

Tightening torque: 11 36 2AZ .

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

G04789851

Courtesy of BMW OF NORTH AMERICA, INC.

Remove all special tools.

Assemble engine.