For cars with K7M engine
Remove connector 1, Figure 12-3, of the oxygen sensor control from the holder.
Figure 12-3 - Disconnecting the control oxygen sensor of the K7M engine: 1 - oxygen sensor control block; 2 - clamp; 3 - oxygen control sensor
Disconnect the wiring harness connector from the oxygen sensor control connector. Disconnect clamp 2.
Unscrew the control oxygen sensor 3 (device Mot. 1495 or replaceable insert 22 from the kit type 811382 f. "USAG").
Operations for all vehicle configurations
Disconnect the wiring harness connector from connector 1, Figure 12-4, of the diagnostic oxygen sensor.
Figure 12-4 - Removing the diagnostic oxygen sensor: 1 - Oxygen sensor diagnostic connector; 2 - diagnostic oxygen sensor
Disconnect the oxygen sensor diagnostic connector from the mounting bracket.
Unscrew the diagnostic oxygen sensor 2 (device Mot. 1495 or replaceable insert 22 from the kit type 811382 f. "USAG").
If there is a coupling 1, Figure 12-5, unscrew nut 2 of the coupling clamp bolt connecting the exhaust system pipeline, loosen the coupling (13mm socket head, extension and ratchet handle).
Figure 12-5 - Exhaust system pipe coupling: 1 - coupling sleeve; 2 - nut of the tie bolt
If the exhaust system is one piece, then on pipeline 1, Figure 12-6, of the exhaust system, mark with a marker the middle B between marks A and B of the cutting zone, as shown in the figure (ruler).
Figure 12-6 - Marking the cutting area of the exhaust system pipeline: 1 - exhaust system pipeline; A, B - cutting zone marks; B - the middle between marks A and B (location of pipeline cutting)
Cut pipe 1, Figure 12-7, of the exhaust system using pipe cutter 2 in accordance with the marking in the middle between the two marks on the pipe (chain pipe cutter type 60 11 00 01 f. "Stahlwille" or device Mot. 1199-01).
Unscrew the two nuts 1, Figure 12-8, studs securing the catalytic converter to the exhaust manifold 3, remove the springs 2 (replacement head 10, extension and ratchet).
For cars with K7M engine
Disconnect the catalytic converter bracket from the suspension mount (if necessary, cut the suspension cushion) (flat screwdriver, technological knife).
[The material was taken from a website: LADAMAN]
Figure 12-7 - Cutting the exhaust system pipe: 1 - exhaust system; 2 - pipe cutter
Figure 12-8 - Removing the catalytic converter on a vehicle with a K7M engine: 1 - nut; 2 - spring; 3 - exhaust manifold; 4 - catalytic converter
Operations for all vehicle configurations
Remove catalytic converter 4 and sealing ring. The sealing ring must be replaced.
Remove burrs from exhaust pipe parts that will be reused on the vehicle (flat file).
Remove the coupling from the pipeline (if available) (flat head screwdriver). The coupling must be replaced.