11 36 047 Removing and installing/renewing inlet and exhaust adjustment units on left side (N63O1)

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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 adjuster and exhaust camshaft adjuster.

Installation note:

Replace central bolts after releasing.

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

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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).

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

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

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Release screws (1).

Remove upper tensioning rail (2).

NOTE: Better illustration without special tools shown. Illustrations shows N63 engine.

Fig 4: Identifying Upper Tensioning Rail And Screws

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Remove central bolt (2) of inlet adjustment unit.

Installation note:

Replace central bolts after releasing.

Fig 5: 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 6: 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 7: Identifying Inlet Adjustment Unit And Timing Chain

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

NOTE: Illustrations shows N63 engine.

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).

NOTE: Illustrations shows N63 engine.

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 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 10: 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 11: 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 12: Identifying Adjustment Units Central Bolts

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

Tightening torque: 11 31 4AZ .

NOTE: Illustrations shows N63 engine.

Fig 13: Identifying Sliding Rail With 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: Checking Timing Adjustment - 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: Checking Timing Adjustment - Exhaust 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 16: Pretensioning Special Tool (2 249 162)

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

Fig 17: Identifying Central Bolts

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Remove special tool 11 9 190 .

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

Fig 18: Turning Engine To 150° Crankshaft Position Before TDC Firing Position Of Cylinder 1

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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: Positioning Special Tools

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

Jointing torque 5 Nm .

Fig 20: Identifying Connecting Rod Bolts And Crankshaft

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

Jointing torque 5 Nm .

Fig 21: Installing Central Bolt Of Intake Camshaft Using Special Tool 11 4 350

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Remove special tool 11 9 190 .

Fig 22: Positioning Special Tools

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

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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: Tightening Exhaust Camshaft Central Bolt

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

Tightening torque of 30 Nm

Fig 25: Tightening Intake Camshaft Central Bolt

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

TORSION ANGLE ADJUSTMENT90° .

Fig 26: Tightening Central Bolt Of Exhaust Camshaft Using Special Tool 00 9 120

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

TORSION ANGLE ADJUSTMENT90° .

Remove special tool 2 249 117 .

Fig 27: Tightening Central Bolt Of Exhaust Camshaft Using Special Tool 00 9 120

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Check TIMING again.

Remove all special tools.