Muffler Overview
Muffler Overview
• The exhaust manifold and turbocharger are one component; Removing and installing, refer to => [ Turbocharger ] Turbocharger.
1 Rear Muffler
• Original equipment as one unit with center muffler. For repairs, replace each separately.
• Separating point, refer to => [ Center Muffler and Rear Muffler, Separating ] Center and Rear Muffler, Separating
• Align the exhaust system free of tension. Refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
2 Nut
• 25 Nm
3 Rear Clamping Sleeve
• Before tightening, align exhaust system free of tension, refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
• Installed position, refer to => [ Installed Position of Rear Clamping Sleeve ]
• Tighten bolts evenly
4 Bolt
• 23 Nm
5 Bracket
6 Retaining Loop
• Replace if damaged
7 Nut
• 25 Nm
8 Front Clamping Sleeve
• Before tightening, align exhaust system free of tension, refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
• Installed position, refer to => [ Installed Position of Front Clamping Sleeve ]
• Tighten bolts evenly
9 Seal
• Replace
10 Nut
• 25 Nm
11 Catalytic Converter
• Protect catalytic converter from shocks and impact stress
• Removing and installing, refer to => [ Catalytic Converter ] Catalytic Converter
• Align the exhaust system free of tension. Refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
12 Nut
• 40 Nm
• Replace
• Coat turbocharger stud bolts with hot bolt paste.
• Hot bolt paste, refer to the Parts Catalog
13 Seal
• Replace
14 Heated Oxygen Sensor (HO2S) (G39) and Oxygen Sensor (O2S) Heater (Z19)
• Coat the threads on the new heated oxygen sensors with assembly paste.
• when installing a used oxygen sensor, coat threads with hot bolt paste; hot bolt paste, refer to the Parts Catalog
• Assembly paste or hot bolt paste must not get onto slots of the oxygen sensor body.
15 Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) (G130) and Heater for Oxygen Sensor (O2S) 1 after Catalytic Converter (Z29)
• Coat the threads on the new heated oxygen sensors with assembly paste.
• When installing a used oxygen sensor, coat threads with hot bolt paste; hot bolt paste, refer to the Parts Catalog
• Assembly paste or hot bolt paste must not get onto slots of the oxygen sensor body.
16 Front Muffler
• With flex joint
Danger of damaging the decoupling element.
• Decoupling element must not be bent more than 10°.
• Do not load decoupling element on cable.
• Do not damage wire mesh at decoupling element.
• Depending on the version, there may be a front exhaust pipe installed instead of a front muffler - item 17 - => [ (Item 17) Front Exhaust Pipe ]
• Removing and installing, refer to => [ Front Exhaust Pipe and Front Muffler ] Front Exhaust Pipe and Front Muffler
• Align the exhaust system free of tension. Refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
17 Front Exhaust Pipe
• With flex joint
Danger of damaging the decoupling element.
• Decoupling element must not be bent more than 10°.
• Do not load decoupling element on cable.
• Do not damage wire mesh at decoupling element.
• Depending on the version, there may be a front exhaust pipe installed instead of a front muffler - item 16 - => [ (Item 16) Front Muffler ]
• Removing and installing, refer to => [ Front Exhaust Pipe and Front Muffler ] Front Exhaust Pipe and Front Muffler
• Align the exhaust system free of tension. Refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
18 Bolt
• 23 Nm
19 Suspended Mount
• Replace if damaged
• Check pretension, refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
20 Center Muffler
• Original equipment as one unit with rear muffler. For repairs, replace each separately.
• Separating point, refer to => [ Center Muffler and Rear Muffler, Separating ] Center and Rear Muffler, Separating
• Align the exhaust system free of tension. Refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
21 Suspended Mount
• Replace if damaged
• Check pretension, refer to => [ Exhaust System, Aligning ] Exhaust System, Aligning
22 Bolt
• 23 Nm
23 Tail Pipe
• For repairs, replace each separately => [ Exhaust Tail Pipes, Replacing ] Exhaust Tail Pipes, Replacing
• Separating point between the rear muffler and the tailpipe, refer to => [ Exhaust Tail Pipes, Replacing ] Exhaust Tail Pipes, Replacing
24 Clamp
• 60 Nm
Installed Position of Front Clamping Sleeve
- Install clamping sleeve in angle position shown.
• Threaded connections point toward the right.
• Nuts face up.
• alpha = approximately 20°
Installed Position of Rear Clamping Sleeve
- Install the clamping sleeve so that the ends of the bolt do not extend beyond the lower edge of the clamping sleeve.
• The threaded connections face downward.