Removal and installation the exhaust manifold (BMW 3 Series E46)

Models 316i, 318i

Removal

1. Disconnect the intake pipe from the exhaust manifold, refer to Section Removal and installation the intake manifold.

2. Unscrew the two bolts securing the air supply line to the exhaust manifold.

3. Loosen the mounting bolts and remove the exhaust manifold from the cylinder head.

Installation

4. Clean the sealing surfaces on the exhaust manifold and cylinder head. Always replace the sealing gasket with a new one.

5. Lubricate the threads of the exhaust manifold mounting studs with high-temperature copper grease.

6. Secure the exhaust manifold with new self-locking copper nuts, tightening them crosswise from the inside out to the torque specified in the Specifications.

7. Secure the air supply line with a new gasket to the exhaust manifold.

8. Secure the exhaust pipe with a new seal to a torque of 30 Nm on the exhaust manifold.

Models 320d

Removal

9. Remove the engine air filter element, refer to Section Replacing the air filter element.



10. Remove the turbocharger mounting bolt covers at points "1".

11. Remove the screen from the bar "2" (arrow on the illustration).

12. Unscrew the bolts securing the turbocharger to the exhaust manifold through three holes.



13. Remove the two bolts securing the exhaust gas recirculation pipe from the exhaust manifold.

14. Loosen the mounting nuts and remove the exhaust manifold from the cylinder head.

Installation

15. Clean the sealing surfaces on the exhaust manifold and cylinder head. Always replace the sealing gasket with a new one.

16. Lubricate the threads of the exhaust manifold mounting studs with high-temperature copper grease.

17. Secure the exhaust manifold with new self-locking copper nuts, tightening them crosswise from the inside out to the torque specified in the Specifications.

18. Secure the air supply line with a new gasket to the exhaust manifold.

19. Secure the turbocharger with a new gasket to the exhaust manifold with a torque of 45 Nm.



20. Insert the screen from the side to the bar "2".

21. Replace the turbocharger to air filter housing bolt covers.

22. Install the engine air filter element, refer to Section Replacing the air filter element.

Models 320i, 323i, 328i

Removal

Due to limited space, the right engine mount must be removed using a tool. To do this, the engine must be lifted with a crane.

23. Remove the air box, refer to Section Removal and installation the air intake box.

24. Remove the oxygen sensors from both exhaust manifolds, refer to Section Removal and installation the oxygen sensor.

25. Loosen the mounting nuts and remove the intake pipe from the exhaust manifold, refer to Section Removal and installation of the exhaust system.



26. Lift the engine with a crane by the front eye. If you don't have a crane, thread a cable through the eye. Insert a strong pipe under the cable and place it on two supports.

Mount the BMW 00 0 200 tool on the left and right side of the wing supports and secure them with bolts. Another tool is also available: KLANN No. KL-0205-3US.

27. Raise the engine with a lift approximately 5 mm to relieve the engine mounts.

28. Remove the front end reinforcement, refer to Section Removal and installation the front suspension beam.

29. Unscrew the bolts securing the right engine support with the bracket from the body and engine.

30. Disconnect first the front and then the rear exhaust manifold from the cylinder head.

Installation

31. Clean the sealing surfaces on the exhaust manifold and cylinder head. Always replace the sealing gasket with a new one.



32. Lubricate the threads of the exhaust manifold mounting studs with high-temperature copper grease.

33. Secure the exhaust manifold with new self-locking copper nuts, tightening them crosswise from the inside out to the torque specified in the Specifications.

34. Secure the exhaust pipe with a new seal to a torque of 30 Nm on the exhaust manifold.

35. Secure the right engine support and bracket to the torques specified in the Specifications. Lower the engine, remove the crane.

36. Install the front reinforcement of the vehicle, refer to Section Removal and installation the front suspension beam.

37. Install the oxygen sensors on both exhaust manifolds, refer to Section Removal and installation the oxygen sensor.

38. Install the air collection box, refer to Section Removal and installation the air intake box.

39. Secure the lower engine compartment cover, refer to Section Removal and installation the lower engine compartment cover.

(Original publication posted on the website: BMWMAN.ru)