11 65 045 Removing and installing/replacing low-pressure exhaust turbocharger (M57T2-SCR)

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 H.P. TURBOCHARGER .
Remove diesel particle filter. See 18 31 080 REMOVING AND INSTALLING/REPLACING DIESEL PARTICULATE FILTER (M57T2 WITH SCR)
Remove CHARGE AIR HOSE

IMPORTANT: In event of turbocharger damage:

Pressure pipes
Charge air cooler
Intake plenum

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

Unfasten screw (1)

Tightening torque, see 11 65 3AZ in 11 65 TURBOCHARGER AND CONTROL .

Fig 1: Identifying Screw

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Fig 2: Identifying Gaiter And Track Rod

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

Tightening torque, see 11 00 4AZ in 11 00 STANDARD SCREW CONNECTION .

Release nut (3) and disengage linkage.

Remove vacuum unit for turbine control flap.

Fig 3: Identifying Screws, Nut And Holder

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Detach vacuum hose (3) from connecting piece.

Unfasten screws (2).

Tightening torque, see 11 00 4AZ in 11 00 STANDARD SCREW CONNECTION .

Release hose clamp (1) from oil return line.

Tightening torque, see 11 42 4AZ in 11 42 OIL FILTER AND PIPES .

Fig 4: Identifying Vacuum Hose, Screws And Hose Clamp

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Loosen hose clamps (1).

Tightening torque 11 42 4AZ in 11 42 OIL FILTER AND PIPES .

Fig 5: Identifying Hose Clamps

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Release screws (1) with special tool 12 2 100.

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

Remove L.P. turbocharger downwards.

Installation note:

Clean sealing surfaces and replace gasket.

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

Fig 6: Releasing Screws Using Special Tool (12 2 100)

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When replacing low-pressure turbocharger, release screws (1) and modify compressor bypass (2).

Tightening torque 11 00 2AZ in 11 00 STANDARD SCREW CONNECTION .

Replace O-ring.

Fig 7: Identifying Low-Pressure Turbocharger Screws And Compressor Bypass

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IMPORTANT: Nut (1) must not be released under any circumstances.
Do not use linkage (2) as a carrying handle.
(May result in failure of the turbocharger group).

Fig 8: Caution For Releasing Nut

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

Fig 9: Identifying Spacer Ring And Threads

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Adjust turbine control flap.

Assemble engine.