Exhaust System Assembly Overview

Exhaust System Assembly Overview





1 Oxygen Sensor (G39), 55 Nm

• Bank 1 sensor 1.

• Only use hot bolt paste (G 052 112 A3) to lubricate the threads ; do not let the hot bolt paste (G 052 112 A3) get onto the slits of the oxygen sensor body.

2 Front Exhaust Pipe with Catalytic Converter

CAUTION!
Danger of damaging the decoupling element:

• Decoupling element must not be bent more than 10 degrees.

• Do not load decoupling element on cable.

• Do not damage wire mesh at decoupling element.

• Protect the catalytic converter from shocks and impact stress.

• Removing and installing, refer to --> [ Front Exhaust Pipe with Catalytic Converter ] Service and Repair.

• Align the exhaust system free of stress. Refer to --> [ Exhaust System, Aligning Free of Tension ] Exhaust System, Aligning Free of Tension.

• Exhaust system, checking for leaks. Refer to --> [ Exhaust System, Checking for Leaks ] Testing and Inspection.

3 Oxygen Sensor, 55 Nm

With engine code CBFA

• Heated Oxygen Sensor (HO2S) 2.

• Bank 1 sensor 2.

• Only use hot bolt paste (G 052 112 A3) to lubricate the threads; do not let the hot bolt paste (G 052 112 A3) get onto the slits of the oxygen sensor body.

4 Oxygen Sensor (O2S) behind Three Way Catalytic Converter (TWC) (G130), 55 Nm

• Only use hot bolt paste (G 052 112 A3) to lubricate the threads ; do not let the hot bolt paste (G 052 112 A3) get onto the slits of the oxygen sensor body.

With engine code CBFA:

• Bank 1 sensor 3

With engine code CCTA:

• Bank 1 sensor 2

5 Rubber Insulator

• Replace if damaged.

6 Bolt, 25 Nm

• Always replace.

7 Suspended Mount

• Replace if damaged.

8 Rear Muffler

• Original equipment as one unit with center muffler. For repairs, replace each separately.

• Exhaust system, separating and connecting. Refer to --> [ Middle and Rear Mufflers, Separating and Connecting ] Service and Repair.

• Align the exhaust system free of stress. Refer to --> [ Exhaust System, Aligning Free of Tension ] Exhaust System, Aligning Free of Tension.

• Exhaust system, checking for leaks. Refer to --> [ Exhaust System, Checking for Leaks ] Testing and Inspection.

9 Nut, 25 Nm

10 Rear Clamping Sleeve

• For individual replacement of center and rear mufflers.

• Note the installed position. Refer to --> [ Clamping Sleeve Location ].

• Tighten the bolts evenly.

11 Center Muffler

• Original equipment as one unit with rear muffler. For repairs, replace each separately.

• Exhaust system, separating and connecting. Refer to --> [ Middle and Rear Mufflers, Separating and Connecting ] Service and Repair.

• Align the exhaust system free of stress. Refer to --> [ Exhaust System, Aligning Free of Tension ] Exhaust System, Aligning Free of Tension.

• Exhaust system, checking for leaks. Refer to --> [ Exhaust System, Checking for Leaks ] Testing and Inspection.

12 Front Clamping Sleeve

• Before tightening the exhaust system, adjust it when it is cold so that it is free of tension. Refer to --> [ Exhaust System, Aligning Free of Tension ] Exhaust System, Aligning Free of Tension.

• Note the installed position. Refer to --> [ Clamping Sleeve Location ].

• Tighten the bolts evenly.

13 Bolt, 25 Nm

14 Gasket

• Always replace.

15 Nut, 40 Nm

• Always replace.

• Coat the stud bolts on the exhaust manifold with hot bolt paste (G 052 112 A3).

Clamping Sleeve Location





- When installing the clamping sleeve, ensure that the bolt end - arrow - does not project beyond the lower edge of the clamping sleeve:

• Threaded connection points toward the right.

• Tighten the threaded connections equally to 25 Nm.