Exhaust system components, removing and installing: Notes
NOTE:
- Always replace seals, gaskets and self-locking nuts.
- All cable ties which are opened or cut open on removal must be replaced in same position when installing.
- Any heat insulation sleeves which are taken off when removing must be re-attached in same position when installing.
- After working on exhaust system ensure that system is not under stress, and that it has sufficient clearance from bodywork. If necessary, loosen clamps and align mufflers and exhaust pipes so that sufficient clearance is maintained to bodywork at all points and mountings are evenly loaded.
- Flexible pipe connection (de-coupling element) in front exhaust pipe must not be bent more than 10° - otherwise it can be damaged.
The following list pertains to Fig 1.
- Center muffler
- Center muffler and rear muffler are one unit as original equipment, but can be replaced separately for repair purposes
- Cutting point, see SEPARATING
- Aligning exhaust system. See EXHAUST SYSTEM, ALIGNMENT .
- 25 Nm
- Mounting
- Replace if damaged
- 50 Nm
- Different versions possible
- Always replace
- Turbocharger
- Cylinder bank 1 (right)
- Removing and installing, see RIGHT TURBOCHARGER, REMOVING AND INSTALLING
- Gasket
- Always replace
- Oxygen sensor - 55 Nm
- Before catalytic converter
- Cylinder bank 1 (right)
- Grease threads only with high-temperature lubricant G 052 112 A3. Lubricant must not get into slots on probe body
- 50 Nm
- Different versions possible Always replace
- Turbocharger
- Cylinder bank 2 (left)
- Removing and installing, see LEFT TURBOCHARGER, REMOVING AND INSTALLING
- Gasket
- Always replace
- Oxygen sensor - 55 Nm
- Before catalytic converter
- Cylinder bank 2 (left)
- Grease threads only with high-temperature lubricant G 052 112 A3. Lubricant must not get into slots on probe body
- Oxygen sensor - 55 Nm
- After catalytic converter
- Cylinder bank 2 (left)
- Grease threads only with high-temperature lubricant G 052 112 A3. Lubricant must not get into slots on probe body
- Front exhaust pipe
- Cylinder bank 2 (left)
- With starter catalytic converter and main catalytic converter
- With flexible connection (de-coupling element)
- Do not bend flexible connection more than 10° - otherwise it can be damaged
- Protect from damage by knocks and impact
- Components of exhaust pipe mounting, see COMPONENTS OF MOUNTING FOR FRONT EXHAUST PIPE
- Removing and installing, see FRONT EXHAUST PIPE (LEFT), REMOVING AND INSTALLING
- Aligning exhaust system, see EXHAUST SYSTEM, ALIGNMENT
- Front clamp
- Position of bolts, see INSTALLATION POSITION OF FRONT CLAMPS
- Align exhaust system so it is free of stress before tightening clamp. See EXHAUST SYSTEM, ALIGNMENT .
- Tighten bolted connections evenly.
- 40 Nm
- 16 - Oxygen sensor - 55 Nm
- After catalytic converter
- Cylinder bank 1 (right)
- Grease threads only with high-temperature lubricant G 052 112 A3. Lubricant must not get into slots on probe body
- Front exhaust pipe
- Cylinder bank 1 (right)
- With starter catalytic converter and main catalytic converter
- With flexible connection (de-coupling element)
- Do not bend flexible connection more than 10° - otherwise it can be damaged
- Protect from damage by knocks and impact
- Components of exhaust pipe mounting, see COMPONENTS OF MOUNTING FOR FRONT EXHAUST PIPE
- Removing and installing, see FRONT EXHAUST PIPE (RIGHT), REMOVING AND INSTALLING
- Aligning exhaust system, see EXHAUST SYSTEM, ALIGNMENT
- Rear muffler
- On left side of vehicle
- Rear muffler and center muffler are one unit as original equipment, but can be replaced separately for repair purposes
- Cutting point, see SEPARATING
- Align exhaust system. See EXHAUST SYSTEM, ALIGNMENT .
- 25 Nm
- Mounting
- Replace if damaged
- 25 Nm
- Rear muffler
- On right side of vehicle
- Rear muffler and center muffler are one unit as original equipment, but can be replaced separately for repair purposes
- Cutting point, see SEPARATING
- Align exhaust system. See EXHAUST SYSTEM, ALIGNMENT .
- Cross brace
- 40 Nm
- Rear clamp
- For separate replacement of center and rear mufflers
- Installation position, see INSTALLATION POSITION OF REAR CLAMPS
- Align exhaust system so it is free of stress before tightening clamp. See EXHAUST SYSTEM, ALIGNMENT .
- Tighten bolted connections evenly.