Exhaust system for vehicles with All Wheel Drive (AWD) - Component overview: Notes
NOTE:
The following list refers to Fig 1.
- - Turbocharger
- - Seal
- replace
- - Heated Oxygen Sensor (HO2S) -G39- (before catalytic converter)
- Bank 1, sensor 1
- Removing and installing. See OXYGEN SENSORS, REMOVING AND INSTALLING .
- The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body
- When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body.
- Tighten to 55 N.m
- - Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130- with Oxygen Sensor (O2S) Heater 1 -Z29-
- Bank 1, sensor 2
- Removing and installing. See OXYGEN SENSORS, REMOVING AND INSTALLING .
- The threads of new oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body
- When re-using the old oxygen sensor, grease the threads with hot bolt paste; the paste must not get into slots of oxygen sensor body.
- Tighten to 55 N.m
- - Catalytic converter
- Protect from hit- and impact stress
- Install exhaust system free of stress. See ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE) .
- Removing and installing. See CATALYTIC CONVERTER, REMOVING AND INSTALLING .
- - Seal
- replace
- - 25 N.m
- - Front exhaust pipe
- with decoupling element
- Decoupling element must not be kinked more than 10°, otherwise it may be damaged
- - Front clamping sleeve
- Before tightening, align exhaust system is tension-free. See ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE) .
- Installation position. See INSTALLED POSITION OF FRONT CLAMPING SLEEVE .
- Tighten bolts evenly
- - 40 N.m
- - Spacer sleeve
- - Buffer
- - Strap
- - Washer
- - 30 N.m
- - Rear muffler
- for left side of vehicle
- Factory-installed with center muffler as one unit. If repair is necessary, replace separately
- Install exhaust system free of stress. See ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE) .
- - Suspended mount
- Replace if damaged
- - 25 N.m
- - Rear muffler
- for right side of vehicle
- Factory-installed with center muffler as one unit. If repair is necessary, replace separately
- Install exhaust system free of stress. See ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE) .
- - 40 N.m
- - Rear clamping sleeve
- 2x
- Used when center or rear muffler is replaced separately.
- Before tightening, align exhaust system is tension-free. See ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE) .
- Installed position. See INSTALLED POSITION OF REAR CLAMPING SLEEVES .
- Tighten bolts evenly
- - Center muffler
- Factory-installed with rear muffler as one unit. If repair is necessary, replace separately
- Install exhaust system free of stress. See ALIGN EXHAUST SYSTEM TENSION-FREE (VEHICLES WITH FRONT WHEEL DRIVE) .
- - 25 N.m
- - Suspended mount
- Replace if damaged
- - Bolt
- - Washer
- - Compression spring
- - Strap
- - Spacer sleeve
- - 25 N.m
- - 40 N.m
- replace