Removing Turbocharger

WARNING: This page is about a different variant/trim than selected.

NOTE: Dirt and contamination

Risk of damage to units or components
→ Protect components from dirt and contamination.

→ Clean or replace dirty components.

To remove the left turbocharger, loosen the connecting clamp for the primary catalytic converter at the left.
Turbocharger on right-hand side: Disconnect vent line -1- on the oil separator -2- , pull off vacuum hose -3- on the vacuum modulator and disconnect cable plug -4- on the diverter valve.
For replacing turbochargers: Separate positive crankcase ventilation hose.
> 105255 REPLACING POSITIVE CRANKCASE VENTILATION HOSE (V8 BITURBO)

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Right turbocharger: Oil separator vent line, vacuum hose, cable plug on diverter valve
Turbocharger on left-hand side: Pull off vacuum hose -1- on the vacuum modulator and disconnect cable plug -2- on the diverter valve.

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Left turbocharger: Vacuum hose and cable plug on diverter valve

Information
- Clean all line connections carefully and close them off or cover them.
- Use suitable stoppers for closing off lines.
Remove oil pipe -1- supply line.
1. 5.1 Unscrew screw -2- at the front and remove screw using a bar magnet.
2. 5.2 Unscrew rear screws -3- .
3. 5.3 Lift cover plates on the coolant lines using a wedge and pull them up -Arrows- .
4. 5.4 Disconnect oil pipes on the turbocharger. Collect escaping oil.
5. 5.5 Disconnect oil pipe at the front. Collect escaping oil.
6. 5.6 Replace O-rings.
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Oil pipes supply line
Disconnect front oil pipes return -1- at the front.
1. 6.1 Unscrew screw -2- and remove it using a bar magnet.
2. 6.2 First disconnect the line for the turbocharger on bank 1-4; the flange secures the line for the turbocharger on bank 5-8.
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Return oil pipes
Unscrew screw for retainer plate for coolant lines -2 and 3- at the rear.
1. 7.1 Unscrew screws -1- .
2. 7.2 Remove retainer plate -4- and disconnect coolant lines. Catch escaping coolant.
3. 7.3 Replace O-rings.
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Mounting for turbocharger coolant lines
Loosen connecting clamp -1- for the exhaust manifold.
Tool: long socket-wrench insert (a/f 13) required!
1. 8.1 Unscrew hexagon nut -2- on the connecting clamp.
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Connecting clamp securing turbocharger to exhaust manifold
Remove turbocharger and carefully disconnect and close off the front oil pipe. Collect escaping oil.
1. 9.1 Replace O-rings.
Replace gaskets -1- and connecting clamps -3- on the exhaust manifold -2- .

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Exhaust manifold seals
Carefully clean sealing faces, line connections and adjacent areas.