Front exhaust pipe (B206i/B234i)
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Front exhaust pipe (B206i/B234i)
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1.
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Unplug the oxygen sensor's leads, release the cable clamp and clip and raise the car.
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Important
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Do not twist the leads. The oxygen sensor is sensitive to knocks and jolts and must be handled with care.
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2.
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Remove the oxygen sensor.
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3.
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Loosen the joint between the front exhaust pipe and the middle pipe.
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4.
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Unscrew the front exhaust pipe from the exhaust manifold.
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5.
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Remove the bolt from the bracket and lower away the exhaust pipe.
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2.
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Fit the bolt securing the exhaust pipe to the bracket on the engine but do not tighten it.
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3.
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Position the front exhaust pipe and screw it to the exhaust manifold.
Tightening torque 40 Nm (30 lbf ft).
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4.
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Tighten the bolt securing the exhaust pipe to the bracket on the engine.
Tightening torque 40 Nm (30 lbf ft).
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5.
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Bolt together the joints under the car.
Tightening torque 20 Nm (15 lbf ft).
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6.
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Fit the oxygen sensor in place but first lubricate the threads with Molycote 1000.
Tightening torque 55 Nm (41 lbf ft).
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Important
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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.
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7.
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Lower the car to the floor.
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8.
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Plug in the oxygen sensor's leads and fit the cable clamp and clip.
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