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18 10 100 Replacing intermediate pipe (N57 D30 U/O 0/1)

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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.

Necessary preliminary work: 

Support intermediate pipe with special tool 31 2 220 and suitable universal lifter.

Fig 1: Supporting Exhaust System Using Special Tool (31 2 220)
G04742070Courtesy of BMW OF NORTH AMERICA, INC.

If fitted: 

Release screws (1).

Remove heat shield (2).

Fig 2: Identifying Heat Shield And Screws
G08485082Courtesy of BMW OF NORTH AMERICA, INC.

F01, F02, F07 only: 

Release screws (1).

Tightening torque 18 20 6AZ .

Only if auxiliary heating fitted. Release screw (2) on metering pump.

Tightening torque 18 20 7AZ .

Release screws (3) on underbody panelling.

Remove reinforcement plate (4).

Fig 3: Identifying Reinforcement Plate And Screws
G06889336Courtesy of BMW OF NORTH AMERICA, INC.

F10 and F11 only: 

Release screws (1).

Tightening torque 18 20 6AZ .

Only if auxiliary heating fitted. Release screw (2) on metering pump.

Tightening torque 18 20 7AZ .

Release screws (3) on underbody panelling.

Remove reinforcement plate (4).

Fig 4: Identifying Reinforcement Plate, Underbody Panelling And Metering Pump Screw
G09918395Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: If the separation point is not marked by a punch mark on the pipe, determine the separation point by means of the pipe length on the new intermediate pipe.
Carry over cutting line to defective intermediate pipe and mark.
Secure intermediate pipe against falling out.
Cut through exhaust pipes at marked point with a suitable tool.
Fig 5: Identifying Center Silencer Marked Point
G09918407Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Tightening torque 18 20 4AZ .

Remove intermediate pipe.

Fig 6: Identifying Exhaust System Nut
G06889337Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

Adjust intermediate pipe to fit and connect with clamps.

Center clamp and tighten down.

Tightening torque 18 20 9AZ .

The procedure is identical on both sides.

Fig 7: Identifying Center Clamps
G04794086Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Check exhaust system for leaks.