11 65 020 Removing and installing/replacing exhaust turbocharger (N55) RWD (X6 sDrive 35i)

WARNING: Risk of burning!
Only perform this repair work on an engine that has cooled down.

WARNING: The module consists of exhaust turbo charger and exhaust manifold.
The weight of the turbocharger is approx. 15 kg.

CAUTION: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) !

NOTE: Troubleshooting on exhaust turbocharger.

Necessary preliminary work:

Drain COOLANT .
Remove right ENGINE SUPPORT ARM .
Remove COOLANT THERMOSTAT .
Remove COOLANT PUMP .
Remove CHARGE AIR COOLER .
Remove CATALYTIC CONVERTER .

Unclip Bowden cable for engine compartment lid actuator from transverse reinforcement (1).

Detach A/C line from bracket.

Release screws on left and right sides. Tightening torque 51 71 4AZ .

Remove transverse reinforcement (1).

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Release screws (1).

Tightening torque 11 53 4AZ .

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Release screw (1).

Tightening torque 11 53 10AZ .

If necessary, use appropriate tool to loosen coolant return line (3) and coolant flow line (2) at connection point.

Installation note:

Replace sealing rings.

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Release screw (1).

Just slacken screws (3) on holder (2).

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Release screw (1).

Tightening torque 11 42 6AZ .

If necessary, use appropriate tool to loosen oil return lines (2).

Installation note:

Replace the sealing ring.

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Release screw (1).

Tightening torque 11 42 7AZ .

If necessary, use appropriate tool to loosen oil return lines (2).

Possibility of oil escaping when oil return line is disconnected.

Installation note:

Replace the sealing ring.

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Release screw (1).

Tightening torque: 11 42 4AZ .

If necessary, use appropriate tool to loosen coolant return lines (2) at connection point.

Installation note:

Replace the sealing ring.

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Loosen plug connection (1) at blow-off valve.

Release screw (2).

Tightening torque 11 65 4AZ .

If necessary, use appropriate tool to loosen oil feeder lines at point of connection (3).

Possibility of oil escaping when oil return line is disconnected.

Installation note:

Replace the sealing ring.

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Disconnect vacuum hose (1) from vacuum line.

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Disconnect vacuum hose (1) from cylinder head cover.

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Remove heat shield (1).

Tightening torque: 11 65 2AZ .

Loosen all flange nuts (2) along the line.

Remove module by maneuvering downwards on gearbox side.

NOTE: Overall weight of module is approximately 15 kg .

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NOTE: Oil supply line (2) can only be replaced after removal of the turbocharger.

Release screw (1).

If necessary, use appropriate tool to loosen oil feeder lines at point of connection (2).

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Installation note:

Replace all sealing rings (1).

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Installation note:

Replace all graphite seals (1).

Position turbocharger on cylinder head and hold in place with two bolts.

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Insert bolt (1) but do not tighten at this point.

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Fig 1: Flange Nuts Tightening Sequence

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CAUTION: The module consists of exhaust turbocharger and exhaust manifold and must be installed stress-free.
Torque and torque sequence must be observed without fail.

Tightening torque: 11 65 1AZ .

Join all flange nuts in sequence 1 to 15 to 8 Nm .
Tighten all flange nuts to a torque of 13 Nm in sequence (1 to 15).
Installation note:

Flange nuts 1 to 5 are accessible from above.

Flange nuts 6 to 15 are accessible from below.

Secure screws (3).

Tightening torque: 11 65 9AZ .

Tighten bolt (1).

Tightening torque 11 65 8AZ .

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Assemble engine.

Observe BMW Diagnostics System instruction.

Carry out BMW leakage test for intake system.