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18 12 090 Replace front intake pipe (N55)

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Special tools required: 

WARNING: Risk of burning! 
This repair work may only be carried out on an exhaust system which has cooled down.

Support front silencer with special tool 31 2 220 and a suitable universal lifter.

Fig 1: Supporting Exhaust System With Special Tool (31 2 220)
G04742070Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: If the separation point is not marked by a punch mark in the pipe, determine the separation point by means of the pipe length on the new front pipe.

Carry over separation point to defective front pipe and mark.

Secure front pipe against falling off.

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

Fig 2: Identifying Cutting Points On Pipes
G09876568Courtesy of BMW OF NORTH AMERICA, INC.

Release clamp (1).

Tightening torque 18 31 1AZ .

Fig 3: Identifying Clamp
G09876539Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Install front pipe to fit and connect with clamps.

Center clamps and tighten down.

Tightening torque 18 31 8AZ .

Modify vibration absorber.

Fig 4: Installing Front Pipe And Connecting With Clamps
G08504372Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Check exhaust system for leak tightness.
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