18 32 050 Removing and Installing/Replacing Cylinder 1-6 Catalytic Converter

18 32 050 Removing and installing/replacing cylinder 1-6 catalytic converter (N74)





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





Necessary preliminary tasks:
^ Remove right intake filter housing
^ Remove charge air pipe cylinder 1-6
^ Remove exhaust system
^ Remove control sensor cylinder 1-6
^ Remove monitoring sensor cylinder 1-6





Graphic shows the left side, the procedure for the right side is identical.

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.

Renew clamp and gasket.

Slacken nut (2).

Tightening torque 18 31 5AZ.

Feed out catalytic converter (3) and remove.

Installation:
For easier installation the V-band clamp can be turned by 180°. Make sure that a clearance of 20 mm to 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.