Catalytic Converter: Service and Repair

18 32 005 Removing and installing/replacing the catalytic converter (N14, N18)





Warning!
Risk of burning!
This repair work may only be carried out on an exhaust system which has cooled down.





Necessary preliminary work:
^ Move front panel into working position.





Note:

The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove the control sensor.

Remove monitoring sensor.





Release screw and remove holder (1).





Release screws and remove upper heat shield (1).

Tightening torque 11 65 7AZ.





Release screws and remove lower heat shield (1).

Tightening torque 11 65 7AZ.





Unscrew nuts.

Installation note:
Replace nuts.

Tightening torque 18 31 3AZ.

Unscrew nuts (1).

Tightening torque 18 31 4AZ.





Loosen screws and nut.

Remove exhaust manifold (1).

Installation note:
^ Replace gasket.
^ Clean sealing surfaces.
^ Apply a thin coating of copper paste to bolt thread.
^ Tightening torque 18 31 1AZ.