18 32 050 Removing and installing/replacing the catalytic converter (B36, B38)

WARNING: Risk of burning!
Only perform this repair work after the exhaust system has cooled down.

Necessary preliminary tasks:

Removal:

Remove rubber mounts (1) from the catalytic converter.

Check rubber mount. Replaced damaged rubber mounts.

Parts: Rubber mount

Fig 1: Rubber Mounts Of Catalytic Converter

Courtesy of BMW OF NORTH AMERICA, INC.

Release clamp (1). The clamp must be replaced every time it is removed.

Replace clamp and gasket.

Parts: Clamp.

Clean sealing surface.

Unscrew nuts (2).

Feed out catalytic converter (3) towards bottom and remove.

Fig 2: Catalytic Converter, Clamp, And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Feed in catalytic converter (3) from below and install.

Make sure the seal and clamp between the catalytic converter and exhaust turbocharger are correctly seated.

Tighten clamp (1).

Tightening torque 18 30 1AZ .

Tighten down nuts (2).

Tightening torque 18 30 2AZ .

Fig 3: Catalytic Converter, Clamp, And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Connect rubber mount (1) to catalytic converter.

Fig 4: Rubber Mounts Of Catalytic Converter

Courtesy of BMW OF NORTH AMERICA, INC.