11 36 046 Removing and installing or replacing intake and exhaust camshaft adjusters (B48AO0)

Special tools required:

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

Necessary preliminary work:

Check TIMING
Remove CATALYTIC CONVERTER

Attention!

When replacing the intake and exhaust camshaft adjuster:

When removing, pay attention to or note the identification/part number of the intake and exhaust camshaft adjuster.

An intake and exhaust camshaft adjuster must always be replaced with the same part number .

A combination of different intake and exhaust camshaft adjusters is not permitted!

PuMA measure 64122020 must be observed.

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Overview chart of the intake camshaft adjuster:

7 608 788 Intake camshaft adjuster

8 617 692 Intake camshaft adjuster

8 684 920 Intake camshaft adjuster

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Overview chart of the exhaust camshaft adjuster:

7 608 789 Exhaust camshaft adjuster

8 617 693 Exhaust camshaft adjuster

8 684 921 Exhaust camshaft adjuster

Removal:

Attention!

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

For correct fitting see repair instructions: CHECK TIMING .

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Remove chain tensioner (1).

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Version 1

To remove the central valve (1), use the changeover ratchet (2) from special tool 0 496 855 with special tool 2 450 487.

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Version 2

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

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

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

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Remove VANOS central valve (1) of intake side.

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Remove intake adjuster (1) from intake camshaft.

Slightly tilt intake adjuster (1) and remove downwards.

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Remove VANOS central valve (1) of exhaust side.

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Remove exhaust camshaft adjuster (1) from exhaust camshaft.

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

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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.

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

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Abut VANOS central valve (1) of intake side.

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

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Abut VANOS central valve (1) of exhaust side.

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Install new chain tensioner.

Parts: Chain tensioner

Tighten chain tensioner (1).

Tightening torque 11 31 1AZ .

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

Tightening torque 11 36 1AZ .

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

Tightening torque 11 36 1AZ .

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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 .

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Required reworking:

Check TIMING
Mount CATALYTIC CONVERTER

When replacing the intake and exhaust camshaft adjusters, the l-level must be encoded and programmed if necessary.

Connect diagnosis system and follow diagnosis instructions
Service functions
Power train
Engine electronics
Reset VANOS adaptation values
Encode and program l-level if necessary