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Exhaust manifold (B204i)

Exhaust manifold (B204i)

Dismantling



1. Remove the heat shield over the exhaust manifold.

2. Unscrew the upper nuts at the joint between the exhaust manifold and front exhaust pipe.

3. Raise the car.

4. Unscrew the remaining nuts at the joint between the exhaust manifold and front exhaust pipe and lower the front exhaust pipe.

Lower the car to the floor.

5. Relieve the belt tensioner of load using an extension bar and insert a 6 mm drill bit in the hole, see illustration. Exercise great care to avoid breaking the belt tensioner at its end position. Remove the belt from the power steering pump pulley.


6. Remove the power steering pump bracket with pump and bend it aside.

7. Undo the exhaust manifold retaining nuts. Remove the part in the middle before the outer part. Note that only the outer studs have sleeves.


8. Remove the exhaust manifold with gasket.


To fit



1. Clean the surfaces and fit the exhaust manifold with a new gasket. Fit the outer part before the inner part. To avoid leakage, check that the connecting surfaces for the front exhaust pipe are level with each other.

Note that only the outer studs have sleeves.

Tightening torque: 25 Nm (18.5 lbf ft)

2. Mount the power steering pump bracket with pump and fit the belt on the pulley.


3. Relieve the belt tensioner of load using an extension bar and remove the drill bit.

4. Raise the cars. Position the front exhaust pipe and tighten the joint with the lower nuts.


Tightening torque: 40 Nm (30 lbf ft)

5. Lower the car to the floor.

6. Fit the remaining nuts at the joint between the exhaust manifold and front exhaust pipe.

Tightening torque: 40 Nm (30 lbf ft)

7. Fit the heat shield over the exhaust manifold.