11 36 046 Removing and installing/replacing inlet and exhaust adjustment units (N52K)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Remove CYLINDER HEAD COVER
Check TIMING

IMPORTANT: Install special tool 11 4 280 to release the central bolts on the inlet and exhaust adjustment units and camshafts.

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

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

IMPORTANT: Fit special tool 11 4 282 underneath on side of inlet camshaft.

Fig 1: Identifying Screws And Special Tools (11 4 283)

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Release chain tensioner (2).

Tightening torque 11 31 6AZ .

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

Tightening torque 11 36 1AZ .

Installation:

Replace central bolts.

NOTE: Picture in CAD and does not show special tools.

Fig 2: Identifying Central Bolt And Chain Tensioner

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Remove exhaust adjustment unit (1) from exhaust camshaft.

Remove inlet adjustment unit (2) from inlet camshaft.

Installation:

To facilitate removal and installation of the inlet and exhaust adjustment units, turn the sensor gears at the opening downwards.

Fig 3: Removing Exhaust Adjustment Unit From Exhaust Camshaft

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IMPORTANT: Risk of mixing up the inlet and exhaust adjustment units.
Danger of engine damage!

Inlet and exhaust adjustment units are different.

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

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

Sensor gears can be fitted alternatively.

Fig 4: Identifying AUS/EX Exhaust Camshaft Marks

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Position inlet and exhaust adjustment units on camshafts.

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

Insert central bolts (1).

Tightening torque 11 36 1AZ .

Installation:

Replace central bolts.

IMPORTANT: Install special tool 11 4 280 to secure the central bolts on the inlet and exhaust adjustment units and camshafts.

Fig 5: Identifying Central Bolt And Chain Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Picture in CAD and does not show special tools.

IMPORTANT: Incorrect installation possible!

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

NOTE: Schematic representation of removed timing chain module.

Adjust VALVE TIMING .

Fit CHAIN TENSIONER .

Fig 6: Locating Chain Drive

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Assemble engine.