11 65 030 Removing and installing/replacing exhaust turbocharger, left, cylinders 7 - 12 (N74)

Only perform these tasks on an engine that has cooled down.

Necessary preliminary tasks: 

• Remove CATALYTIC CONVERTER , cylinders 7 - 12
• Remove power steering gear. See HYDRAULIC STEERING GEAR or ACTIVE FRONT STEERING HYDRAULIC STEERING GEAR .
• Remove CHARGE AIR PIPE
• Remove CLEAN AIR PIPE
• Remove INTERMEDIATE PIPE

Release banjo bolt (1).

Tightening torque: see 4AZ in 11 42 OIL FILTER AND LINES

Replace seals.

Unfasten banjo bolt (2).

Replace seals.

Tightening torque: see 2AZ in 11 53 THERMOSTAT AND CONNECTIONS

Disconnect vacuum hose (3) from vacuum unit.

Fig 1: Identifying Vacuum Hose, Plug Connection And Banjo Bolt

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Disconnect plug connection (4).

Open hose clip (1).

Tightening torque: see 7AZ in 11 00 STANDARD SCREW CONNECTION

Pull off coolant line (2).

Installation: 

Replace hose clamp (1)  .

Fig 2: Identifying Coolant Line And Hose Clip

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Release screws (1).

Tightening torque: see 5AZ in 11 42 OIL FILTER AND LINES

Lay oil line from turbocharger to side.

Installation: 

Replace seal  .

Fig 3: Identifying Turbocharger Oil Line Screws

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Release screw (1).

Remove heat shield from starter.

Tightening torque: see 2AZ in 12 41 STARTER MOTOR WITH MOUNTING

Fig 4: Identifying Starter Heat Shield Screw

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Release screw (1).

Tightening torque: see 4AZ in 11 62 EXHAUST MANIFOLD

Remove exhaust turbocharger with coolant line forwards and downwards.

Fig 5: Identifying Exhaust Turbocharger Screws

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If necessary, convert coolant feed line to new turbocharger.

Release banjo bolt (1).

Disconnect line (2).

Replace seals.

Tightening torque: see 3AZ in 11 53 THERMOSTAT AND CONNECTIONS

Fig 6: Identifying Coolant Feed Line And Banjo Bolt

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Install intermediate tube (3).

Tighten self-locking nut (1).

Tightening torque: see 6AZ in 18 31 EXHAUST SYSTEM

Position V-ribbon clips on turbocharger.

Tightening torque: see 7AZ in 18 31 EXHAUST SYSTEM

Fig 7: Identifying Intermediate Tube, Self-Locking Nut And V-Band Clamp

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Tighten bolt (1).

Tightening torque: see 4AZ in 11 62 EXHAUST MANIFOLD

Fig 8: Identifying Exhaust Turbocharger Screws

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Assemble engine.

Check vacuum connections.

Observe BMW diagnosis instructions.

1. Complete vehicle
2. Drive
3. Engine electrical system
4. Air supply
5. Boost pressure control