11 36 047 Removing and installing/replacing intake and exhaust adjustment units on left side (N63 O1)

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Special tools required:

(cylinder bank 5 to 8)

Necessary preliminary tasks:

Read fault memory and make a documentary record.
Remove LEFT CYLINDER HEAD COVER .
Remove LEFT GEAR CASE COVER .
Check TIMING .

IMPORTANT: If special tool can not be fitted, hexagon head of relevant camshafts must be counter-supported when releasing central bolt.

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

Installation note:

Replace central bolts after releasing.

Fig 1: 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 2: Identifying Central Bolt

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Release screw (1).

Release special tool 2 249 162 at knurled screws and remove.

Fig 3: Mounting Special Tool (2 249 162)

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Release screws (1).

Remove upper tensioning rail (2).

NOTE: For better graphic without special tools.
Graphic shows N63.

Fig 4: Identifying Upper Tensioning Rail And Screws

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Remove central bolt (2) of intake adjustment unit.

Installation note:

Replace central bolts after releasing.

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

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Detach intake adjustment unit (1) in direction of arrow from intake camshaft.

Graphic shows N63.

Fig 6: Detaching Intake Adjustment Unit From Intake Camshaft

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Feed out intake adjustment unit (2) from timing chain (1).

Lift out intake adjustment unit (2).

Graphic shows N63.

Fig 7: Identifying Inlet Adjustment Unit And Timing Chain

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Detach exhaust adjustment unit (1) in direction of arrow from exhaust camshaft.

Graphic shows N63.

Fig 8: Detaching Exhaust Adjustment Unit From Exhaust Camshaft

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Feed out exhaust adjustment unit (2) from timing chain (1).

Lift out exhaust adjustment unit (2).

Graphic shows N63.

Fig 9: Identifying Exhaust Adjustment Unit And Timing Chain

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IMPORTANT: Danger of mix-up:

Intake and exhaust camshaft adjusters are different.

Mixing up the intake and exhaust adjustment units will cause damage to the engine.

Intake camshaft adjuster is marked with {EIN }.
Exhaust camshaft adjuster is marked with {AUS }.

Fig 10: Identifying Camshaft Adjuster Markings
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Installation note:

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

Fig 11: Identifying Central Bolt

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NOTE: Position of adjustment units in relation to timing chain can be freely selected.

Feed adjuster into timing chain and position on camshafts.

Insert central bolts (1 and 2) on adjustment units without gaps.

Release central bolts (1 and 2) by 45° .

Fig 12: Identifying Central Bolts Of Intake/Exhaust Camshaft Adjusters

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Fit sliding rail (2) and secure with screws (1).

Tightening torque: 11 31 4AZ .

Graphic shows N63.

Fig 13: Identifying Upper Tensioning Rail And Screws

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Position special tool 2 249 144 on intake camshaft.

Secure special tool 2 249 144 with bolts (1).

Fig 14: Identifying Special Tool (2 249 144) On Intake Camshaft

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Position special tool 2 249 159 on exhaust camshaft.

Screw special tool 2 249 159 to special tool 2 249 140 .

Fig 15: Positioning Special Tools On Camshafts

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Screw in special tool 2 249 162 .

Pretension timing chain with special tool 2 249 162 .

Pretension timing chain with special tool 00 9 250 or 00 9 460 to 0.6 Nm .

Fig 16: Pretensioning Special Tool (2 249 162) Using Special Tool (00 9 460)

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Release central bolts (1 and 2) by 45° .

Fig 17: Identifying Central Bolts Of Intake/Exhaust Camshaft Adjusters

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Remove special tool 11 9 190 .

IMPORTANT: Crank engine back at central bolt through 45°.

Fig 18: Turning Engine Central Bolt And Positioning Special Tool (11 9 190) In Gear Case Cover

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Disconnect special tools 11 9 190 from gear case cover.

Rotate crankshaft in direction of engine rotation at central bolt until special tool 11 8 570 comes into contact in front of special tool 11 9 190 .

Fig 19: Identifying Special Tools

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

Joining torque 5 Nm .

Fig 20: Inserting Central Bolt Of Exhaust Camshaft Using Special Tool (11 4 350)

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

Joining torque 5 Nm .

Fig 21: Identifying Central Bolt Of Exhaust Camshaft And Special Tool (11 4 350)

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Remove special tool 11 9 190 .

Fig 22: Identifying Special Tools 11 9 190 & 11 8 570

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

The engine is now 150° before TDC firing position cylinder 1.

Fig 23: Turning Engine Central Bolt And Positioning Special Tool (11 9 190) In Gear Case Cover

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Installation note:

Tighten central bolts beginning with the exhaust camshaft.

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

Tightening torque of 30 Nm

Fig 24: Identifying Exhaust Camshaft Central Bolt

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

Tightening torque of 30 Nm

Fig 25: Identifying Intake Camshaft Central Bolt

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

Joining torque: 30 Nm, angle of rotation: 90°

NOTE: For VANOS gear to inlet and outlet camshafts, the contact surface on the screw head must be greased with assembly paste 4.4 (see OVERVIEW OF CONSUMABLES .

Fig 26: Identifying Exhaust Camshaft Central Bolt And Special Tool (00 9 120)

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

Joining torque: 30 Nm, angle of rotation: 90°

NOTE: For VANOS gear to inlet and outlet camshafts, the contact surface on the screw head must be greased with assembly paste 4.4 (see OVERVIEW OF CONSUMABLES .

Remove special tool 2 249 117 .

Fig 27: Identifying Central Bolt Of Intake Camshaft And Special Tool (00 9 120)

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Check TIMING again.

Remove all special tools.