Removing and Installing/Replacing Right Exhaust Camshaft

11 31 038 - Removing and installing/replacing right exhaust camshaft (N73)





Cylinders 1 to 6.

Necessary preliminary tasks:
- Remove intake air manifold Service and Repair.
- Remove right cylinder head cover Removing and Installing/Sealing Right Cylinder Head Cover.
- Remove exhaust adjustment unit Removing and Installing/Replacing Inlet and Exhaust VANOS on Right Side (N73) on right side.
- Remove timing case cover Removing and Installing Top Right Timing Case Cover (N73) at top right.





Remove oil line (1).
Bearing cap (2) of exhaust camshaft, release screws and remove.
Release nuts of bearing caps 1 to 6 in area (3) from outside to inside and set down in order.

Important!
Cylinder head and bearing cap are matched to each other and must not be mixed up.
Risk of damage.

Remove exhaust camshaft (4).

Installation:
Tightening torque 11 31 1AZ 11 31 Camshaft





Important!
Plain compression rings (1) can easily break.

Remove and install/replace plain compression rings (1).

Plain compression rings (1) are engaged at joint.
Press compression ring (1) on one side into groove, press upwards from below on other side and remove catch.
Carefully pull compression ring (1) apart and remove towards front.

Installation:
Install compression rings in reverse sequence to their removal.





Release screw (2) and remove sensor gear (1).

Installation:
Tightening torque 11 31 14AZ 11 31 Camshaft.





Important!
Danger of mixing up exhaust camshafts.

1 - Exhaust camshaft for cylinders 1 to 6 is marked as shown in illustration with AUS 16.
2 - Exhaust camshaft for cylinders 7 to 12 is marked as shown in illustration with AUS 712.
Mixing up the two camshafts will result in engine damage.





Important!
Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.
Used rocker arms may only be reused in the same position.





Check dowel sleeves (2) for damage and correct installation position.
Ends of compression rings point upwards.





Fit bearing cover.
Tighten down nuts of bearing bracket for cylinders 1 to 6 in area (1) from inside to outside.
Fit bearing cap (2) and tighten down.

Installation:
Tightening torque 11 31 1AZ 11 31 Camshaft





Assemble engine in reverse sequence to its disassembly.

Installation:
Clean all bearings and cams of exhaust camshaft and lubricate with engine oil.