9-3 Viggen Coupe (9400) L4-2.3L Turbo (B235) HO (1999)
Catalytic Converter: Service and Repair
Front Exhaust Pipe With Catalytic Converter (B204i)
Dismantling
IMPORTANT
The exhaust pipe's flexible section is highly sensitive to bending and must not be bent more than about 5°, as this could result in permanent deformation.
Do not allow the catalytic converter to hang from the flexible section.
1
Remove the heat shield over the exhaust manifold.
2
Unplug the oxygen sensors leads, undo the clip and cable clamps.
IMPORTANT
The leads must not be twisted. The oxygen sensor is sensitive to knocks and blows and must be handled with care.
3
Unscrew the upper nuts at the joint between exhaust manifold and front exhaust pipe. Raise the car.
4
Remove the oxygen sensor.
5
Loosen the joint between the front exhaust pipe and the middle pipe.
6
Undo the remaining nuts at the joint between the front exhaust pipe and exhaust manifold.