Removing and Installing/Replacing Inlet and Exhaust Adjustment Units

11 36 046 Removing and installing or replacing intake and exhaust camshaft adjusters (N52T)

Special tools required:





Necessary preliminary work:
^ Remove cylinder head cover
^ Check timing





Important!
Install special tool 11 4 280 to secure the central bolts on the intake and exhaust camshaft adjusters 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 intake camshaft.





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.





Remove exhaust camshaft adjuster (1) from exhaust camshaft.

Remove inlet adjuster (2) from intake camshaft.

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





Important!
Risk of mixing up the intake and exhaust camshaft adjusters.
Danger of engine damage!





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.





Position inlet 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.

Important!
Install special tool 11 4 280 to secure the central bolts on the intake and exhaust camshaft adjusters and camshafts.

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





Important!
Incorrect installation possible!

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

Note:
Schematic representation of removed timing chain module.

Adjust valve timing.

Fit chain tensioner.





Assemble engine.