11 36 046 Removing and installing or replacing intake and exhaust camshaft adjusters (N52)

Special tools required: 

• 11 4 280 .
• 11 4 281 .
• 11 4 282 .
• 11 4 283 .

Necessary preliminary work: 

• Remove CYLINDER HEAD COVER .
• Check TIMING .

Fit special tool 11 4 283 with screws (1).

Fit special tool 11 4 281 on special tool 11 4 283 .

Fig 1: Fitting Special Tools

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Release chain tensioner (2).

Tightening torque 11 31 6AZ .

Release central bolts on intake and exhaust adjustment units (1).

Tightening torque 11 36 1AZ .

Installation: 

Replace central bolts  .

Fig 2: Identifying Chain Tensioner And Central Bolts

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Remove exhaust camshaft adjuster (1) from exhaust camshaft.

Remove intake camshaft adjuster (2) from intake camshaft.

Installation: 

To facilitate removal and installation of the intake and exhaust camshaft adjusters, turn the camshaft sensor wheels downwards at the opening.

Fig 3: Removing Camshaft Adjusters

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Intake and exhaust adjustment units are different.

VANOS is marked with AUS/EX for the exhaust camshaft.

VANOS is marked with EIN/IN for the intake camshaft.

Camshaft sensor wheels can be fitted alternatively.

Fig 4: Identifying Intake/Exhaust Camshaft Markings

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Position intake and exhaust adjustment units on camshafts.

Installation position of intake and exhaust adjustment units can be freely selected.

Insert central bolts (1).

Tightening torque 11 36 1AZ .

Installation: 

Replace central bolts  .

Fig 5: Identifying Chain Tensioner And Central Bolts

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Press tensioning rail (1) by hand against guide rail and make sure timing chain is guided in tensioning rail (1).

Fig 6: Identifying Tensioning Rail

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Adjust VALVE TIMING .

Fit CHAIN TENSIONER .

Assemble engine.