11 36 047 Removing and installing/renewing inlet and exhaust adjustment units on left side (N63 hybrid)

WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

WARNING: High-voltage system - danger to life!

IMPORTANT: When the engine is shut down, the inlet and exhaust adjustment unit is normally locked in its initial position.
The situation may arise in some individual cases where this initial position is not reached and the camshaft can continue to be rotated in the adjustment range of the adjustment unit.
Where central bolts are not greased at the bolt contact points up to engine number 20024295 , the camshaft adjuster must be renewed due to safety reasons.
The central bolts is greased from engine number 20024296 .

(cylinder bank 5 to 8)

Necessary preliminary tasks:

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

To release central bolts, use special tool 11 9 890 or grip at hexagon head of camshaft.

Fig 1: Removing Central Bolts Using Special Tool (11 9 890)

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IMPORTANT: If special tool 11 9 890 can not be fitted, it is necessary when releasing the central bolt to grip the hexagon head of the respective camshafts.

Release central bolts (1 and 2) of inlet and exhaust adjustment units.

Installation:

Replace central bolts after releasing.

Fig 2: Identifying Adjustment Unit Central Bolts

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IMPORTANT: Check whether head of central bolt (1) is greased (see arrow in illustration).
If no grease can be seen on the bolt head of central bolt (1), the intake and exhaust camshaft adjuster must be renewed due to safety reasons.

Installation:

Coat contact face of central bolt (1) with copper paste.

Fig 3: Locating Central Bolt Head Greased Area

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Release hexagon socket screw.

Release special tool 11 9 900 at knurled screws and remove.

Fig 4: Positioning Of Special Tool (11 9 900) On Chain Tensioner

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Release screws (1).

Remove upper tensioning rail (2).

NOTE: Shown without special tools for purposes of clarity.

Fig 5: Identifying Upper Tensioning Rail And Screws

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Remove central bolt (2) of inlet adjustment unit.

Installation:

Replace central bolts after releasing.

Fig 6: Identifying Adjustment Unit Central Bolts

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

Fig 7: Removing Inlet Adjustment Unit From Inlet Camshaft

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

Lift out inlet adjustment unit (2).

Fig 8: Identifying Inlet Adjustment Unit And Timing Chain

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Remove central bolt (1) of exhaust adjustment unit.

Installation:

Replace central bolts after releasing.

Fig 9: Identifying Adjustment Unit Central Bolts

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

Fig 10: Removing 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).

Fig 11: Identifying Inlet Adjustment Unit And Timing Chain

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

Inlet adjustment unit (1) is marked with ON
Exhaust adjustment unit (2) is marked with OFF

Fig 12: Identifying Inlet And Exhaust Adjustment Units
Courtesy of BMW OF NORTH AMERICA, INC.