11 36 048 Removing and installing/replacing inlet and exhaust adjustment units on right side (N63O1)

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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 in illustration).

Installation note:

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

Fig 2: Coating Contact Face Of New Central Bolt With Copper Paste

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Release screw (1).

Remove special tool 2 249 162 .

Fig 3: Mounting Special Tool (2 249 162) And Pretensioning Screw

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Release screws (1).

Remove upper tensioning rail (2).

NOTE: Illustrations shows N63 engine.

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 Exhaust Adjustment Unit Central Bolt

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

NOTE: Illustrations shows N63 engine.

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).

NOTE: Illustrations shows N63 engine.

Fig 7: Identifying Exhaust Adjustment Unit And Timing Chain

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Remove central bolt (2) of inlet adjustment unit.

Installation note:

Replace central bolts after releasing.

Fig 8: Identifying Inlet Adjustment Unit Central Bolt

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

NOTE: Illustrations shows N63 engine.

Fig 9: Detaching Inlet Adjustment Unit

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

Lift out inlet adjustment unit (2).

NOTE: Illustrations shows N63 engine.

Fig 10: Identifying Inlet Adjustment Unit And Timing Chain

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IMPORTANT: Danger of mix-up:
Intake and exhaust camshaft adjusters are different.
Mixing up the inlet and exhaust adjustment units will cause damage to the engine.

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

Fig 11: Identifying Intake And Exhaust Adjuster With Mark
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Installation note:

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

Fig 12: Coating Contact Face Of New Central Bolt With Copper Paste

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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 Adjustment Units Central Bolts

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

Tightening torque: 11 31 4AZ .

Fig 14: Identifying Top Slide Rail With Screws

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

Fig 15: Checking Timing Adjustment - 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: Checking Timing Adjustment Of Camshaft

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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)

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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 To 150° Crankshaft Position Before TDC Firing Position Of Cylinder 1

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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: Positioning Special Tools

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

Jointing torque 5 Nm .

Fig 21: Tightening Central Bolt Of Intake Camshaft

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

Jointing torque 5 Nm .

Fig 22: Installing Central Bolt Of Exhaust Camshaft

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Remove special tool 11 9 190 .

Fig 23: Positioning 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 To 150° Crankshaft Position Before TDC Firing Position Of Cylinder 1

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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 Bolts 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 Bolts Of Exhaust Camshaft

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

TORSION ANGLE ADJUSTMENT90° .

Fig 27: Securing 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 .

TORSION ANGLE ADJUSTMENT90°

Remove special tool 2 249 117 .

Fig 28: Securing Central Bolt Of Exhaust Camshaft Using Special Tool 00 9 120

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Check TIMING again.

Remove all special tools.