Catalytic Converter: Service and Repair

Catalytic converter, removing and installing
Removing
Removing front exhaust pipe





^ Unplug 4-pin connectors of oxygen sensors and move wires clear.
1-(Brown) to oxygen sensor downstream of catalytic converter -G130(only with engine code ANB)
2-(Black) to oxygen sensor -G39- upstream of catalytic converter





^ Remove air cleaner cover -arrow-.





^ Remove bolts -arrows-.
^ Disengage EVAP canister purge regulator valve -N80 -1- from air duct -2-.
^ Remove both screws -arrows- for air duct -2-.





^ Disconnect wires / unplug connectors from:
1- ACE valve
2- Mass Air Flow sensor
3- Wastegate bypass regulator valve -N75
^ Disconnect hoses -4 to 7-.





^ Disconnect hose to secondary air motor -8-.
^ Move wires clear.
^ Unbolt air cleaner housing -9-.
^ Remove air cleaner.

Note: Vacuum line to secondary air combination valve is clipped to underside of air intake hose.





^ Remove bolts -arrows- securing turbocharger to catalytic converter.
^ Lift out catalytic converter.

Installing
Install in reverse order:
^ Grease thread of oxygen sensor only with hot bolt paste "G 052 112 A3"; paste must not be allowed to come into contact with slits in probe body.
^ Stress-free alignment of exhaust system.





Tightening torques