Muffler: Service and Repair

Removing And Installing Rear Mufflers


Removing rear mufflers







Preliminary work: Remove rear spoiler, rear bumper and centre heat shield.







1. Unscrew rear muffler from the turbocharger. Unscrew the -four fastening nuts- on the left and right for this purpose.







2. Disconnect oxygen sensors. Disconnect and disengage the four plugs at the rear of the closing panel for this purpose.







3. Detach restraining straps. Undo the two restraining straps on the rear muffler. Unscrew the two -hexagon socket screws- for this purpose.







CAUTION:
- Falling rear muffler.
- The rear muffler is loose after the restraining straps are removed. A second person should hold it up.

4. Push restraining straps out of the holder. Press the restraining strap into the recesses on the engine carrier using a screwdriver and move outwards.-View from engine side-







5. Remove rear muffler. Two persons can now remove the rear muffler.

Installing rear mufflers
1. Install rear mufflers with new seals. The seals between the exhaust turbochargers and the rear muffler must be replaced. Move the rear muffler into installation position and push the two tensioning straps over the holder on the engine carrier. Then slightly tighten the two hexagon socket head bolts.







2. Screw down the rear muffler on the exhaust catalytic converters. To do this, replace the four fastening nuts on the turbocharger flange on the left and right of the vehicle and tighten to 30 Nm (22 ftlb.).







3. Tighten tensioning straps. Centre the rear muffler and align free of tension. Tighten the two hexagon socket screws to 15 Nm (11 ftlb.).







4. Connect oxygen sensors. Reconnect the four oxygen sensor cables and clip them in.
To conclude: Install bumpers, centre heat shield and rear spoiler.