11 65 045 Removing and installing/replacing low-pressure turbocharger (large turbocharger)

WARNING: Risk of burning!

Only perform this repair work on an engine that has cooled down.

Recycling

Catch escaping engine oil with suitable auxiliary materials.

Observe country-specific waste disposal regulations.

Necessary preliminary work:

Remove acoustic cover at front
Remove acoustic cover at rear.
Remove diesel particulate filter. See 18 31 080 REMOVING AND INSTALLING/REPLACING DIESEL PARTICULATE FILTER (M57T2)
Remove H.P. TURBOCHARGER
Remove CHARGE AIR HOSE

IMPORTANT: In event of exhaust turbocharger damage:

check the above for foreign bodies, damage and correct function, replacing if necessary.

Unfasten screw (1)

Fig 1: Identifying Screw

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Release screws (1) and remove holder (2).

Release nut (3) and disengage linkage.

Fig 2: Identifying Screws, Nut And Holder

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Detach vacuum hose (3) from connecting piece.

Unfasten screws (2).

Unfasten hose clamp (1) from oil return.

Fig 3: Identifying Vacuum Hose, Screws And Hose Clamp

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) with special tool 11 6 050.

Tightening torque, see 11 65 2AZ in TURBOCHARGER AND CONTROL (M57TU) .

Remove L.P. turbocharger downwards.

Installation note:

Clean sealing surfaces and replace gasket.

To avoid damaging the threads and prevent exhaust turbocharger leaks, insert mounting bolts in 1/2 turns simultaneously.

Fig 4: Identifying Screws

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IMPORTANT: Spacer ring (1) must be fitted without fail.
Clean threads (2) with thread cutter.

Fig 5: Identifying Spacer Ring And Threads

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Assemble engine.