11 36 048 Removing and installing/replacing intake and exhaust adjustment units on right side (N63 O1)

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Special tools required:

(cylinder bank 1 to 4)

Necessary preliminary work:

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

IMPORTANT: If special tool 2 249 117 can not be fitted, it is necessary to counterhold hexagon head of respective camshaft when releasing central bolt.

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

Installation note:

Replace central bolts after releasing.

Fig 1: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters

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IMPORTANT: Check whether head of central bolt (1) is greased (see arrow).

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).

Remove special tool 2 249 162 .

Fig 3: Mounting Special Tool (2 249 162)

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Release screws (1).

Remove upper tensioning rail (2).

Graphic shows N63.

Fig 4: Identifying Upper Tensioning Rail And Screws

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Remove central bolt (1) of exhaust adjustment unit.

Installation note:

Replace central bolts after releasing.

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

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

Graphic shows N63.

Fig 6: 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 7: Identifying Exhaust Adjustment Unit And Timing Chain

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Remove central bolt (2) of intake adjustment unit.

Installation note:

Replace central bolts after releasing.

Fig 8: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters

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

Graphic shows N63.

Fig 9: 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 10: 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 11: Identifying Camshaft Adjuster Markings
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Installation note:

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

Fig 12: 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 13: Identifying Central Bolts Of Intake And Exhaust Camshaft Adjusters

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Position top slide rail (2) and secure with screws (1).

Tightening torque: 11 31 4AZ .

Fig 14: Identifying Upper Tensioning Rail And Screws

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Position special tool 2 249 137 on intake camshaft and secure with screws (1).

Fig 15: Identifying Special Tool (2 249 137)

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Position special tool 2 249 140 on special tool 2 249 137 and secure with screws (1).

Fig 16: Identifying Special Tools (2 249 137 And 2 249 140) 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 17: Pretensioning Special Tool (2 249 162) Using Special Tool (00 9 460)

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IMPORTANT: Loosen central bolts (1 and 2) by maximum 45°.

Fig 18: Identifying Central Bolts

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Remove special tool 11 9 190 .

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

Fig 19: Turning Engine Central Bolt And Positioning Special Tool (11 9 190) In Gear Case Cover

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Position engine with special tool 11 9 190 in front of special tool 11 8 570 as illustrated in the graphic.

Fig 20: Identifying Special Tools

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

Joining torque 5 Nm .

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

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

Joining torque 5 Nm .

Fig 22: Identifying Central Bolt Of Exhaust Camshaft And Special Tool (11 4 350)

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Remove special tool 11 9 190 .

Fig 23: Identifying Special Tools

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

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

Fig 24: 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 intake camshaft.

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

Tightening torque of 30 Nm

Fig 25: Inserting Central Bolt Of Intake Camshaft

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

Tightening torque of 30 Nm

Fig 26: Inserting Central Bolt Of Exhaust Camshaft

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Secure central bolt (1) of intake 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 27: Inserting Central Bolt Of Intake Camshaft Using Special Tool (00 9 120)

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Secure 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 28: Inserting Central Bolt Of Exhaust Camshaft Using Special Tool (00 9 120)

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Check TIMING again.

Remove all special tools.