11 36 046 Removing and installing/replacing intake and exhaust camshaft adjusters (B48, B46)

Special tools required: 

• 2 358 122
• 0 496 855
• 2 450 487
• 11 6 480

Necessary preliminary work: 

• Remove CYLINDER HEAD COVER .
• Check TIMING .
• Remove the CATALYTIC CONVERTER .

Removal: 

Attention  !

Release VANOS central valve (1) only with installed special tool 2 358 122 .

For correct fitting see repair instructions: CHECK TIMINGS .

Fig 1: Releasing VANOS Central Valve With Special Tool (2 358 122)

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Version 1 

Use the reversible ratchet head (2) from special tool 0 496 855 with special tool 2 450 487 to release the central valve (1).

Fig 2: Releasing Central Valve Using Reversible Ratchet Head

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Version 2 

To release the central valve (1), use special tool 0 496 855.

Fig 3: Releasing Central Valve Using Special Tool (0 496 855)

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Release VANOS central valve (1) of exhaust camshaft adjuster.

Fig 4: VANOS Central Valve Of Exhaust Camshaft Adjuster

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Release VANOS central valve (1) of intake camshaft adjuster.

Fig 5: VANOS Central Valve Of Intake Camshaft Adjuster

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Remove VANOS central valve (1) of intake side.

Fig 6: Removing VANOS Central Valve Of Intake Side

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Remove intake adjuster (1) from intake camshaft.

Slightly tilt intake adjuster (1) and remove downwards.

Fig 7: Removing Intake Adjuster From Intake Camshaft

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Remove VANOS central valve (1) of exhaust side.

Fig 8: Removing VANOS Central Valve Of Exhaust Side

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Remove exhaust camshaft adjuster (1) from exhaust camshaft.

Slightly tilt exhaust camshaft adjuster (1) and remove downwards.

Fig 9: Removing Exhaust Camshaft Adjuster From Exhaust Camshaft

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Installation: 

Attention  !

Risk of mixing up the intake and exhaust camshaft adjusters.

Danger of engine damage  !

Intake and exhaust camshaft adjusters are different.

VANOS is marked with EX  for the exhaust camshaft.

VANOS is marked with IN  for the intake camshaft.

Fig 10: Locating Intake And Exhaust Camshaft Adjusters

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Feed intake adjuster (1) into timing chain (2) and position on intake camshaft (3).

Fig 11: Intake Adjuster, Timing Chain And Intake Camshaft

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Abut VANOS central valve (1) of intake side.

Fig 12: VANOS Central Valve Of Intake Camshaft Adjuster

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Feed exhaust camshaft adjuster (1) into timing chain (2) and position on exhaust camshaft (3).

Fig 13: Exhaust Camshaft Adjuster, Timing Chain And Exhaust Camshaft

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Abut VANOS central valve (1) of exhaust side.

Fig 14: VANOS Central Valve Of Exhaust Camshaft Adjuster

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Install new chain tensioner.

Tighten chain tensioner (1).

Tightening torque 11 31 1AZ .

Fig 15: Chain Tensioner

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Tighten VANOS central valve of intake camshaft adjuster (1).

Tightening torque 11 36 1AZ .

Fig 16: Tightening VANOS Central Valve Of Intake Camshaft Adjuster

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Tighten VANOS central valve of exhaust camshaft adjuster (1).

Tightening torque 11 36 1AZ .

Fig 17: Tightening VANOS Central Valve Of Exhaust Camshaft Adjuster

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Remove all special tools.

Crank engine with special tool 11 6 480 twice in direction of engine rotation.

Attention  !

Do not crank engine back. 

Fig 18: Cranking Engine With Special Tool (11 6 480) To TDC Firing Position Of Cylinder 1

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Required follow-up work: 

• Check TIMING .