Removing and installing / replacing exhaust turbocharger (N14)

Necessary preliminary tasks: 

• Remove EXHAUST MANIFOLD .

Installation note: 

The following components must be checked before installation of the exhaust turbocharger:

Engine oil and coolant and screw connection: Check supply and return lines for dirt contamination and obstructions. Clean and replace if necessary.

Check air filter for dirt contamination (particles) and replace if necessary.

In the case of heavy dirt contamination on supply and return lines it is recommended to change the engine oil with oil filter.

Check correct functioning of crankcase ventilation.

Replace all gaskets.

Fig 1: Exhaust Turbocharger Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

When fitting engine oil pipe and banjo bolt, install thermal protection (1).

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 2: Identifying Heat Shield And Banjo Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note: 

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

Fig 3: Identifying Heat Shield Clamp

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.