18 32 050 Removing and Installing/Replacing Catalytic Exhaust-Gas Converter for Cylinders 1-3

18 32 050 - Removing and installing/replacing catalytic exhaust-gas converter for cylinders 1-3 (N54)





Warning!
Scalding hazard!
Only perform these tasks after exhaust system has cooled down.





Necessary preliminary tasks:
- Remove front underbody protection 51 47 490 Removing and Installing/Replacing Front Underbody Protection
- Remove rear underbody protection 51 47 491 Removing and Installing/Replacing Rear Underbody Protection
- Remove exhaust system Service and Repair
- Release right tie rod 32 21 231 Replacing (Removing and Installing) Left or Right Tie Rod from steering gear





Note:
The oxygen sensors are in danger of being damaged when the catalytic exhaust-gas converters are removed and installed.
Remove control sensor 11 78 513 Replacing Both Oxygen Control Sensors, cylinders 1 to 3.
Remove monitor sensor 11 78 545 Removing and Installing/Replacing Monitor Sensor from cylinders 1 to 3.





Release screws (1).
Remove guard plate (2).





Unscrew nuts (1).
Tightening torque 18 20 2AZ.





Release screws and remove holder (1).
Replace aluminium screws.
Tightening torque, automatic transmission 24 00 2AZ.
Tightening torque, manual gearbox 23 00 2AZ 23 00 Transmission In General.





Release clamp. Clamp must be replaced each time it is released.
Tightening torque 18 31 3AZ 18 31 Exhaust Pipe With Catalytic Converter / Complete System.
In so doing, secure catalytic converter (1) against falling out.
Feed out catalytic converter (1) and remove.

Installation Note:
Clean sealing face. Replace seal and clamp.
Align catalytic converter to exhaust system connecting piece and tighten down.





Add final details to vehicle.
Check exhaust system for leaks.