11 31 573 Adjusting camshaft timing on left side (N63)

Special tools required:

(cylinder bank 5 to 8)

Necessary preliminary tasks:

Remove LEFT GEAR CASE COVER .
Check CAMSHAFT TIMING ON LEFT SIDE .

Get set of special tools 2 249 117 ready for securing camshafts.

Fig 1: Identifying Set Of Special Tools (2 249 117)

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Position special tool 2 249 144 on intake camshaft.

Position exhaust camshaft with special tool 2 249 159 and attach to special tool 2 249 144 .

Fig 2: Positioning Special Tool (2 249 144) On Intake Camshaft

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IMPORTANT: Mount special tool 2 249 117 .

Release central bolts (1 and 2) of intake adjuster and exhaust camshaft adjuster.

Installation note:

Replace central bolts after releasing.

Fig 3: Identifying Central Bolts Of Intake/Exhaust Camshaft Adjusters

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Installation note:

Coat contact surface of new central bolt (1) with 4.4 copper paste.

Fig 4: Identifying Central Bolt

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Insert central bolt (1 and 2).

IMPORTANT: Loosen the central bolts (1 and 2) by maximum 40°.

Fig 5: Identifying Central Bolts Of Intake/Exhaust Camshaft Adjusters

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IMPORTANT: Crank engine back at central bolt through 8°.

Position engine with special tool 11 9 190 in front of special tool 11 8 570 as shown in illustration.

Fig 6: Identifying Special Tools

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Installation note:

Tighten the central bolt (1) beginning with the intake camshaft.

Insert central bolt (1) of intake camshaft with special tool 11 4 350 .

Joining torque 5 Nm .

Fig 7: Inserting Central Bolt of Intake Camshaft Using Special Tool 11 4 350

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Insert central bolt (1) of exhaust camshaft with special tool 11 4 350 .

Joining torque 5 Nm .

Fig 8: Inserting Central Bolt Of Exhaust Camshaft Using Special Tool (11 4 350)

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Remove special tool 11 9 190 .

Fig 9: Identifying Special Tools

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Turn the engine at the central bolt further until the special tool 11 9 190 can be positioned in the gear case cover.

The engine is now in the 150° crankshaft position before the TDC firing position of cylinder 1.

Fig 10: Turning Engine Central Bolt And Positioning Special Tool (11 9 190) In Gear Case Cover

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Installation note:

Tighten the central bolt (1) beginning with the intake camshaft.

Insert central bolt (1) of intake camshaft with torque.

Tightening torque of 30 Nm

Fig 11: Tightening Central Bolt

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Insert central bolt (1) of exhaust camshaft with torque.

Tightening torque of 30 Nm

Fig 12: Tightening Central Bolt

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Insert central bolt (1) of intake camshaft with special tool 00 9 120 .

Torsion angle adjustment 90 °. Refer to 11 36 1AZ .

Fig 13: Inserting Intake Camshaft Central Bolt With Special Tool (00 9 120)

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Insert central bolt (1) of exhaust camshaft with special tool 00 9 120 .

Torsion angle adjustment 90 °. Refer to 11 36 1AZ .

Checking the timing: Remove special tool 2 249 117 .

Fig 14: Inserting Exhaust Camshaft Central Bolt With Special Tool (00 9 120)

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Remove special tools 11 9 190 and 11 8 570 .

Crank engine at central bolt twice in direction of engine rotation until engine returns to 150° before cylinder no. 1 firing TDC position.

Secure vibration damper with special tools 11 8 570 and 11 9 190 in the 150° TDC firing position, cylinder 1 .

Fig 15: Turning Engine Central Bolt And Positioning Special Tool (11 9 190) In Gear Case Cover

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Fit special tool 2 249 144 on intake camshaft and check timing adjustment.

NOTE: Timing is correctly adjusted when special tool 2 249 144 rests without a gap on cylinder head.

Fig 16: Fitting Special Tool (2 249 144) On Intake Camshaft

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Place special tool 2 249 159 on the exhaust camshaft and check timing adjustment.

NOTE: Timing is correctly adjusted when special tool 2 249 159 rests without a gap on special tool 2 249 144 .

Fig 17: Positioning Special Tool (2 249 144) On Intake Camshaft

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Remove all special tools.

Assemble engine.