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Front exhaust pipe (B204L)

Front exhaust pipe (B204L)


To remove


1. Disconnect the oxygen sensor's cables, undo the cable clamp and the clip and lift up the car.

Important

Do not twist the cables. The oxygen sensor is sensitive to blows and impacts and must be handled with care.


2. Remove the oxygen sensor.


3. Undo the joint between the front exhaust pipe and the intermediate pipe.

4. Unbolt the front exhaust pipe from the turbocharger.


5. Remove the screw from the securing point and remove the exhaust pipe.


To fit



1. Clean the joints.

2. Fit the screw which holds the exhaust pipe to the engine, but do not tighten it.

3. Insert the front exhaust pipe and screw it on to the turbocharger. Lubricate the three stud screws on the turbocharger with Molycote 1000 prior to fitting.

Tightening torque: 25 Nm (18.5 lbf ft).

4. Tighten the screw which holds the exhaust pipe to the securing point on the engine.

Turning torque 40 Nm (30 lbf ft).

5. Bolt together the joint under the car.


Tightening torque 20 Nm (15 lbf ft).

6. Refit the oxygen sensor. Lubricate the threads with Molycote 1000 prior to fitting.

Tightening torque 55 Nm (41 lbf ft).

Important

The oxygen sensor is sensitive to blows and impacts and must be handled with care. It is important that the connection between the oxygen sensor and the nipple is impervious to gas.


7. Lower the car to the floor and plug in the oxygen (Lambda) sensor connector. Fit the cable clamp and clip.