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18 12 040 Replacing front silencer (N52K)

WARNING: This page is about a different car, the 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Scalding hazard! 
Only perform these tasks on an engine that has cooled down.

Support front silencer with special tool 31 2 220.

Fig 1: Support Front Silencer With Special Tool (31 2 220)
G04742070Courtesy of BMW OF NORTH AMERICA, INC.
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.
Fig 2: Cutting Exhaust Pipes Through Marked Point Using Suitable Tool
G06907916Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nuts (1).

Tightening torque 18 31 1AZ  .

Remove holder (2).

Installation: 

Replace self-locking nuts.

Replace seal.

Fig 3: Identifying Self-Locking Nuts And Holder
G06907911Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew screws (1) and (2).

Tightening torque 18 31 2AZ .

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

Fig 4: Identifying Bracket With Bolt
G06904773Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Align front silencer to rear silencer and connect with clamps.

Centre clamp and tighten down.

Tightening torque 18 31 5AZ .

Fig 5: Locating Clamps, Bolts
G04742083Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Check exhaust system for leaks.
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