18 32 005 Removing and installing/replacing the catalytic converter (N14, N18)

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

Necessary preliminary work:

NOTE:

The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Release screw and remove holder (1).

Fig 1: Locating Holder Screw

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Release screws and remove upper heat shield (1).

Tightening torque, N14 engine: 11 65 7AZ . Tightening torque, N18 engine: 11 65 7AZ .

Fig 2: Locating Upper Heat Shield Screws

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Release screws and remove lower heat shield (1).

Tightening torque, N14 engine: 11 65 7AZ . Tightening torque, N18 engine: 11 65 7AZ .

Fig 3: Locating Lower Heat Shield Screws

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Unscrew nuts.

Installation note:

Replace nuts.

Tightening torque 18 31 3AZ .

Unscrew nuts (1).

Tightening torque 18 31 4AZ .

Fig 4: Locating Nuts

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Loosen screws and nut.

Remove exhaust manifold (1).

Installation note:

Fig 5: Locating Exhaust Manifold Screws And Nut

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