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Front exhaust pipe (B204L)

Front exhaust pipe (B204L)


Dismantling


1. Unplug the oxygen sensor's leads, release the cable clamp and clip and raise the car.

Important

Do not twist the leads. The oxygen sensor is sensitive to knocks and jolts and must be handled with care.


2. Remove the oxygen sensor.


3. Loosen the joint between the front exhaust pipe and the middle pipe.

4. Unbolt the front exhaust pipe from the turbocharger.


5. Detach the exhaust pipe from the bracket and lower away the pipe.


To fit



1. Clean the joints.

2. Fit the bolt securing the exhaust pipe to the bracket on the engine but do not tighten it.

3. Position the front exhaust pipe and bolt it to the turbocharger. Before fitting, lubricate the three studs on the turbocharger with Molycote 1000.

Tightening torque 25 Nm (18.5 lbf ft).

4. Tighten the bolt securing the exhaust pipe to the bracket on the engine.

Tightening torque 40 Nm (30 lbf ft).

5. Bolt together the joints under the car.


Tightening torque 20 Nm (15 lbf ft).

6. Fit the oxygen sensor in place but first lubricate the threads with Molycote 1000.

Tightening torque 55 Nm (41 lbf ft).

Important

The oxygen sensor is sensitive to knocks and jolts and must be handled with care. It is important to ensure that the connection between oxygen sensor and union is gastight.


7. Lower the car and plug in the oxygen sensor's leads. Fit the cable clamp and clip.