Exhaust System Overview
WARNING: This page is about a different car, the 2009 Audi TT and 2008 Audi TT. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Flex joint in front exhaust pipe must not be bent by more than 10°, otherwise it may be damaged.
Replace gaskets and self-locking nuts.
After exhaust system repairs, make sure exhaust system is not under stress and is far enough from the body. If necessary, loosen clamping sleeve and align muffler and exhaust pipe so that there is adequate distance to body and that weight is evenly distributed among the suspended mounts.
The exhaust manifold and turbocharger are one component, removing and installing, refer to TURBOCHARGER .
- Bolt
- 23 Nm
- Bracket for Exhaust System
- Clamping Sleeve
- Before tightening, ensure exhaust system is tension-free, refer to EXHAUST SYSTEM, ALIGNING
- Installed location, refer to Fig 2
- Tighten bolts evenly
- Nut
- 20 Nm
- Bracket for Exhaust System
- Retaining Loop
- Replace if damaged
- Bolt
- 23 Nm
- Suspended Mount
- Replace if damaged
- Bolt
- 23 Nm
- Tunnel Brace
- Gasket
- Replace
- Nut
- Replace
- 40 Nm
- Coat turbocharger stud bolts with hot bolt paste.
- Hot bolt paste.
- Heated Oxygen Sensor (HO2S) -G39- and Oxygen Sensor (O2S) Heater -Z19-
- 55 Nm
- Only use hot bolt paste to grease thread; do not let paste get onto slits of oxygen sensor body
- Hot bolt paste.
- Removing and installing, refer to Removal and Installation
- Front Exhaust Pipe with Catalytic Converters and Front Muffler
- Flex joint must not be bent by more than 10° - otherwise it may be damaged
- Do not load decoupling element on cable
- Do not damage wire mesh at decoupling element
- Protect catalytic converter from shocks and impact stress
- Removing and installing, refer to FRONT EXHAUST PIPE WITH CATALYTIC CONVERTERS AND FRONT MUFFLER
- Install exhaust system free of stress, refer to EXHAUST SYSTEM, ALIGNING
- Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130- and Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-
- 55 Nm
- Only use hot bolt paste to grease thread; do not let paste get onto slits of oxygen sensor body
- Hot bolt paste.
- Removing and installing, refer to Removal and Installation
- Rear Muffler
- Install exhaust system free of stress, refer to EXHAUST SYSTEM, ALIGNING
- Retaining Loop
- Replace if damaged
- Nut
- 23 Nm
-- Install clamping sleeve in angled position shown.
- Threaded connections point toward the right.
- Nuts face up.
- α = approximately 20°