11 65 020 Removing and installing/replacing exhaust turbocharger (B48B): Notes

WARNING: This page is about a different car, the 2018 BMW 330i xDrive and 2017 BMW 330i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

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

CAUTION: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

NOTE: Prior to replacing the exhaust turbocharger: Observe the notes on troubleshooting on the exhaust turbocharger.
For additional information see: TROUBLESHOOTING ON THE EXHAUST TURBOCHARGER .

Necessary preliminary work:

Drain COOLANT .
Remove CHARGE AIR LINE .
Remove the CATALYTIC CONVERTER .
Remove OIL FEED LINE .
Remove the COOLANT RETURN LINE .
Remove COOLANT FEED LINE .
Remove OIL RETURN LINE .

Removal:

Undo screw (1) from heat shield (2).

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Release screw (1).

Disconnect heat shield (2) in the marked area and remove.

Unfasten screws (3).

Remove heat shield (4).

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Unlock connector (1) and pull off of exhaust turbocharger.

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CAUTION: Exhaust turbocharger is not bolted to the underside, but clamped instead.
When removing/replacing the exhaust turbocharger, clamping strip (6) remains screwed on.
Only the upper bolting connection has to be released.

Release screws in sequence (5 - 1).

Fig 1: Exhaust Turbocharger Screws Loosening Sequence

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Remove reinforcement plate (1).

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Remove the exhaust turbocharger (1) to the front upwards.

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Preparation for installation:

Installation note:

Risk of damage to the exhaust turbocharger!

An insufficient initial filling of the exhaust turbocharger leads to dry running.

While replacing the exhaust turbocharger, it is mandatory to ensure that the initial filling is correctly carried out.

Filling the exhaust turbocharger with the appropriate additive (see appropriate BMW parts catalogue)

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Installation:

NOTE: The following components must be checked before installation of the exhaust turbocharger:
Engine oil, 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.

NOTE: Part number (1) points in the direction of the exhaust turbocharger.

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Parts: Replace seal (1).

Install gasket (1) on cylinder head.

Ensure gasket (1) is installed correctly in the marked area.

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Feed in exhaust turbocharger (1) and position on the clamping strip.

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Mount reinforcement plate (1).

NOTE: Part number points in the direction of right wheel arch.

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Ensure correct installation of exhaust turbocharger (6) on the clamping strip.

CAUTION: Observe tightening specifications.

Screw in nuts and tighten in sequence (1 - 5) .

Tightening torque: 11 62 2AZ .

Fig 2: Exhaust Turbocharger Screws Tightening Sequence

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Connect connector (1) to the exhaust turbocharger and lock.

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Position heat shield (4).

Tighten screws (3).

Tightening torque 11 65 1AZ .

Connect heat shield (2) in the marked area.

Tighten screw (1).

Tightening torque 11 65 1AZ .

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Tighten screw (1) on heat shield (2).

Tightening torque 11 65 2AZ .

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Required follow-up work:

Install OIL RETURN LINE .
Install the COOLANT FEED LINE .
Install the COOLANT RETURN LINE .
Install OIL FEED LINE .
Install CHARGE AIR LINE .
Install the CATALYTIC CONVERTER .
Top up COOLANT .