Muffler: Service and Repair

18 12 040 Replacing front silencer (N52K)

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.





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.

Remove holder (2).

Installation:
Replace self-locking nuts.

Replace seal.





Unscrew screws (1) and (2).

Tightening torque 18 31 2AZ.

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





Installation:
Align front silencer to rear silencer and connect with clamps.

Centre clamp and tighten down.

Tightening torque 18 31 5AZ.





Note:
Check exhaust system for leaks.