Catalytic Converter: Service and Repair
Exhaust Manifolds with Primary Catalytic Converters and Attachments, Assembly Overview
1 Nut, 25 Nm
2 Nut, 25 Nm
3 Exhaust manifold
• For cylinder bank 1
• Removal is only possible when engine is removed
4 M8 25 Nm, M10 40 Nm
5 Heated Oxygen Sensor (HO2S) (G39), 50 Nm
• Installed in exhaust gas stream of cylinders 1, 2, 3 and 4
• Grease only threads with "G 052 112 A3"; "G 052 112 A3" must not get into slots on probe body
• Use ring spanner set for oxygen sensor (3337) for removal and installation
6 Primary catalytic converter
• Installed in exhaust stream of cylinder bank 1
7 Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) 50 Nm
• Grease only threads with "G 052 112 A3"; "G 052 112 A3" must not get into slots on probe body
• Use ring spanner set for oxygen sensor (3337) for removal and installation
8 Catalytic converter
9 Suspended mount
• Installed location --> [ Aligning exhaust system ] Service and Repair
10 25 Nm
11 To middle muffler
12 Suspended mount
13 To middle muffler
14 Gasket
• Replace
15 M8 25 Nm M10 40 Nm
16 Bracket
• For right transmission support
17 Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) 50 Nm
• Grease only threads with "G 052 112 A3"; "G 052 112 A3" must not get into slots on probe body
• Use ring spanner set for oxygen sensor (3337) for removal and installation
18 Heated Oxygen Sensor (HO2S) 2 (G108) 50 Nm
• Installed in exhaust gas stream of cylinders 5, 6, 7 and 8
• Grease only threads with "G 052 112 A3"; "G 052 112 A3" must not get into slots on probe body
• Use ring spanner set for oxygen sensor (3337) for removal and installation
19 Catalytic converter
20 Primary catalytic converter
• Installed in exhaust stream of cylinder bank 2
21 25 Nm
22 Bracket
• For left transmission support
23 25 Nm
24 Exhaust manifold
• For cylinder bank 2
• Removal is only possible when engine is removed
• Removing --> [ Exhaust Manifold ] Exhaust Manifold
25 Gasket
• Replace
• Note installation position