18 40 040 Removing and installing/replacing exhaust manifold (N14)

Special tools required:

17 2 051

WARNING: Burn risk!
These tasks should only be carried out on an exhaust system that has cooled down.

IMPORTANT:

Gaiter and charge air hoses with clamp fastenings must be installed dry and free from grease!

Sealing surfaces and connecting branches must be dry and free from grease.

If gaiter and charge air hoses with clamp fastenings are not installed dry and free from grease, this may result in exhaust turbocharger failure!

Necessary preliminary tasks:

Release clamp and detach charge-air duct (1).

Release clamps (2) and detach air intake hose (3).

Remove clean air pipe (4).

Installation note:

Install gaiter (3) and charge-air duct (1) dry and free from grease.

Connecting branch on exhaust turbocharger must be dry and free from grease.

Fig 1: Locating Air Pipe, Clamps And Charge-Air Duct

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Release spring strap with special tool 17 2 051 and detach coolant hose (1).

Fig 2: Locating Turbocharger From Exhaust Manifold

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Release screws and detach lines (1).

Installation note:

Replace seals.

Tightening torque 11 65 8AZ

Fig 3: Detaching Lines And Screw

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Pull off hose (1).

Unlock connector (2) and remove.

Unscrew bolt (3).

Release spring strap with special tool 17 2 051. Detach line (4) and remove.

Fig 4: Spring Strap With Special Tool (17 2 051)

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Release screw (1) and detach line (2).

Installation note:

Replace seals.

Tightening torque 11 65 4AZ

Release screw (3) and detach line (4).

Installation note:

Replace sealing ring.

Tightening torque 11 65 5AZ

Fig 5: Detach Line And Screw

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Installation note:

When fitting engine oil pipe and banjo bolt, install thermal protection (1) (see BMW Electronic Parts Catalogue).

Wrap thermal protection around engine oil pipe.

Check banjo bolt (2) and engine oil pipe for blockage. Replace blocked banjo bolt and engine oil pipe.

Fig 6: Identifying Heat Shield And Banjo Bolt

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Installation note:

Make sure that thermal protection clamp (1) engages correctly.

Fig 7: Identifying Heat Shield Clamp

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Release screw (1).

Tightening torque 11 65 3AZ

Release screw (2) and remove holder (3).

Tightening torque 11 65 6AZ

Fig 8: Holder And Screw

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Release nuts and remove exhaust manifold (1).

Installation note:

Replace seal and nuts.
Clean sealing surfaces.
Apply a thin coat of copper paste to thread.
Tightening torque 18 40 1AZ

Fig 9: Locating Exhaust Manifold And Nuts
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Release nuts and remove turbocharger (1) from exhaust manifold (2).

Observe important information during removal or replacement of the EXHAUST TURBOCHARGER !

Installation note:

Replace seal and nuts.
Clean sealing surfaces.
Apply a thin coat of copper paste to thread.
Tightening torque 11 65 1AZ

Fig 10: Locating Turbocharger From Exhaust Manifold
Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Assemble engine.
Top up COOLANT .
Check engine oil level.
Clear DME fault memory.