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

Special tools required:

(cylinder bank 1 to 4)

Necessary preliminary tasks:

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

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

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

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

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Installation note:

Replace central bolts after releasing.

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: Identifying Special Tool (2 249 162) And Screw

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Release screws (1).

Remove upper tensioning rail (2).

Illustration shows N63.

Fig 4: Identifying Sliding 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.

Illustration 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).

Illustration 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.

Illustration shows N63.

Fig 9: Detaching Intake Camshaft 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).

Illustration 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.

Fig 11: Identifying Intake And Exhaust Camshaft Adjuster Markings (EIN And AUS)

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

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.

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

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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° .

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

Tightening torque: 11 31 4AZ .

Fig 14: Identifying Sliding Rail And Screws

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

Fig 15: Fitting Special Tool (2 249 137) On Intake Camshaft

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Position special tool 2 249 140 on special tool 2 249 140 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: Identifying Special Tools (2 249 162) And (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 illustration.

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: Inserting Intake Camshaft Central Bolt With 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: Inserting Exhaust Camshaft Central Bolt With 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: Tightening 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: Tightening Central Bolt Of Exhaust Camshaft

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

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

Fig 27: Tightening Intake Camshaft Central Bolt With Special Tool (00 9 120)

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

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

Remove special tool 2 249 117 .

Fig 28: Tightening Exhaust Camshaft Central Bolt With Special Tool (00 9 120)

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Check TIMING again.

Remove all special tools.