Overview - Muffler, 2.9L Engine

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 20 Nm
2. Bracket
   • For the retaining loop
3. Retaining Loop
   • Replace if damaged
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
4. Front Clamping Sleeves
   • Tighten the threaded connections equally to 23 Nm.
   • Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
   • Installation position. Refer to Fig 1.
   • Pushed onto the front muffler stop
5. Center Muffler
   • Removing and Installing. Refer to MUFFLER, REMOVING AND INSTALLING .
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
   • Original equipment as one unit with rear mufflers. If a repair is required replace each separately
   • Separating point. Refer to EXHAUST PIPES/MUFFLERS, DISCONNECTING .
6. Retaining Loop
   • Replace if damaged
   • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
7. Not Installed
8. Not Installed
9. Nut
   • 23 Nm
   • Always replace after removing.
   • Coat the threads with hot bolt paste.
10. Seal
    • Always replace after removing.
11. Front Muffler
    • With the coupling, the coupling must not be bent more than 10° - otherwise it may be damaged
    • Removing and Installing. Refer to FRONT MUFFLER, REMOVING AND INSTALLING .
    • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
12. Rear Clamping Sleeve
    • Before tightening, align the exhaust system without tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
    • Tighten the threaded connections equally to 23 Nm.
    • For individual replacement of the center and rear mufflers
    • Installation position. Refer to Fig 2.
13. Mount
    • Replace if damaged
    • Check the pretension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
14. Bolt
    • 20 Nm
15. Bolt
    • 9 Nm
    • Always replace after removing.
16. Exhaust Door Control Unit
    • Right Exhaust Door Control Unit -J883-
    • Left Exhaust Door Control Unit 2 -J945-
    • There are different versions.
    • The exhaust door control unit version 1 is illustrated
    • Exhaust door control unit version 2. Refer to OVERVIEW - EXHAUST DOOR CONTROL UNIT .
    • Removing and Installing. Refer to EXHAUST DOOR CONTROL UNITS -J883- / -J945-, REMOVING AND INSTALLING .
17. Rear Muffler
    • Removing and Installing. Refer to MUFFLER, REMOVING AND INSTALLING .
    • Exhaust System, Installing without Tension. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .
    • Original equipment one unit with the center muffler. If a repair is required replace each separately
    • Separating point. Refer to EXHAUST PIPES/MUFFLERS, DISCONNECTING .

Installation Position of the Front Clamping Sleeves

Fig 1: Installation Position of the Front Clamping Sleeves

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeves so that the bolt ends do not project over lower edge of the clamping sleeves.

• Installed position: the threaded connections face outward.
• Angle -α- = 45°.

Installation Position of the Rear Clamping Sleeves

Fig 2: Double Clamps

Courtesy of AUDI OF AMERICA, LLC

-- Install the clamping sleeves so that the bolt ends do not project over lower edge of the clamping sleeves.

• Installation position: threaded connections forward.

Individual Mounting Components

Fig 3: Individual Mounting Components

Courtesy of AUDI OF AMERICA, LLC

1. Spacer Sleeve
2. Pressure Spring
3. Washer
4. Bolt - 23 Nm
5. Bolt - 23 Nm
6. Spacer Sleeve
7. Buffer
8. Tab
9. Spacer Sleeve