18 32 050 Removing and Installing/Replacing Cylinder 7-12 Catalytic Converter

18 32 050 Removing and installing/replacing cylinder 7-12 catalytic converter (N74)





Warning!
Scalding hazard!
Only perform these tasks on an engine that has cooled down.





Necessary preliminary tasks:
^ Remove left intake silencer housing
^ Remove charge air pipe, cylinders 7-12
^ Remove exhaust system
^ Remove control sensor, cylinders 7 to -12
^ Remove monitoring sensor, cylinders 7-12





Unscrew nuts (1).

Remove heat shield (2).





Release screws (1).

Tightening torque 18 31 3AZ.

Remove holder (2).





Release clamp (1).

Tightening torque 18 31 4AZ.

Replace clamp and seal.

Slacken nut (2).

Tightening torque 18 31 5AZ.

Feed out catalytic converter (3) and remove.

Installation:
To facility assembly, the V-belt clamp can be turned 180°. Make sure that a distance of 20 mm from other components is maintained.





Installation:
The ends of the V-band clamps must rest parallel to each other.

Tightening torque 18 31 4AZ.





Installation:
If you can see a gap between the ends of the V-band clamps, release and then repeat the screw connection.

Tightening torque 18 31 4AZ.





Installation:
If the ends of the V-band clamps are positioned under each other, release and then repeat the screw connection.

Tightening torque 18 31 4AZ.





Assemble engine.

Check exhaust system for leaks.