Removing and installing catalytic converter · ar4910s5500a · Mercedes-Benz WIS

AR49.10-S-5500A

Removing and installing catalytic converter

23.3.95

ENGINE 111 in MODEL 638

S49.10-3005-09

1 Catalytic converter

2 Exhaust pipe flap

3 Bypass pipe

4 Rear exhaust system

5 Gasket

6 Gasket

7 Self-locking nut

R22 Heatable Lambda probe

 	Removing and installing
	Notes on vehicles with catalytic converter technology	All engines with code 620a	AH49.10-P-1000-01A
1	Remove the heatable Lambda probe (R22)		AR07.52-S-5303A
2	Open catalytic converter (1) flange - rear exhaust system (4)	  Assembly: Replace self-locking nuts, check state of gasket (5), replace if necessary, tightening flange connection evenly.	*BA49.10-N-1002-01A
3	Open catalytic converter (1) flange - Bypass tube (3)	  Assembly: Replace self-locking nuts, tighten flange connection evenly	*BA49.10-N-1003-01A
4	Unscrew self-locking nut (7) which secures the catalytic converter (1) in muffler/cooler	  Replace self-locking nut (7)	*BA49.10-N-1005-01A
5	Open catalytic converter (1) flange - exhaust gas flap (2)	  Assembly: Replace self-locking nuts, check state of gasket (6) and replace if necessary	*BA49.10-N-1004-01A
	Pay attention to the disposal instructions for catalytic converters	 Catalytic converters must not be disposed as scrap	OS49.10-P-1000-01A
6	Remove the catalytic converter (1)
	Check connection points	 Check the flanges, coupling cones, eliminate any remains of burning and corrosion with sandpaper.
7	Assembly in reverse order
8	Check connection points respect to leaktightness

 Exhaust system

Number	Designation		Engine 111.948/ 978


BA49.10-N-1002-01A	Catalytic converter flange - rear exhaust system	Nm	28
BA49.10-N-1003-01A	Catalytic converter flange - Bypass tube	Nm	28
BA49.10-N-1004-01A	Catalytic converter flange - exhaust gas flap	Nm	28
BA49.10-N-1005-01A	Catalytic converter in muffler/cooler	Nm	28