18 32 085 Replace Both Exhaust Pipes With Catalytic Converters

18 32 085 Replace both exhaust pipes with catalytic converters (N54)

Special tools required:





Warning!
Scalding hazard!
Only perform these tasks on an engine that has cooled down.





Support front silencer with special tool 31 2 220 and secure against falling out.





Note:
If the cutting line is not marked by a punch mark in the pipe, determine the cutting line by means of the pipe length on the new front silencer.

Carry over cutting line to faulty front silencer and mark.

Cut through exhaust pipes at marked point with a suitable tool.





Unscrew nuts (1).

Tightening torque 18 31 1AZ.

Replace self-locking nuts.

Replace seals.





Release bolt and remove bracket (1).

Tightening torque 18 31 2AZ.

Lower and remove front silencer with assistance of a second person.





Installation:
Connect front silencer to rear silencer by means of clamp and align.

Centre clamp and tighten down.

Tightening torque 18 20 3AZ.





Note:
Check exhaust system for leaks.