Turbocharger, Removing And Installing: Removing

• If there is mechanical damage to the turbocharger. Refer to FOREIGN OBJECTS IN ENGINE .
• Follow the guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .

-- Remove the air filter housing. Refer to AIR FILTER HOUSING, REMOVING AND INSTALLING .

-- Drain the coolant. Refer to DRAIN THE COOLANT .

Audi Q7/Q8:

Fig 1: Fuel Tank Pressure Sensor 2 -G850- Component Location

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-- Loosen the hose clamp -2- and disconnect the hose for the EVAP system.

-- If installed, disconnect the connector -3- for the Fuel Tank Pressure Sensor 2 -G850-.

-- Remove the vacuum hose -3-.

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-- Press the release buttons on both sides and remove the secondary air injection hose -4-.

-- Loosen the hose clamp -1- and remove the air duct pipe -2-.

Vehicle without a secondary air injection system:

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-- Loosen the hose clamp -arrow-, remove the air duct hose and pivot it to the side.

-- Seal off any open lines and connections with plugs that are thoroughly cleaned from the Engine Bung Set:VAS 6122  .

Vehicles with Secondary Air System:

-- Remove the Secondary Air Injection Pump Motor -V101-. Refer to Secondary Air Injection Pump Motor -V101-, REMOVING AND INSTALLING .

-- Remove the resonator for the secondary air system. Refer to SECONDARY AIR SYSTEM RESONATOR, REMOVING AND INSTALLING .

Continuation for All Vehicles:

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-- Remove the bolt/double bolt -arrow- and then remove the oil return line.

-- Disconnect the connectors:

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1 -

For the Turbocharger Recirculation Valve -N249-

3 -

for Charge Air Pressure Control Module -GX34-

-- Press the release buttons on both sides, remove the hose -4- for the crankcase ventilation from the turbocharger.

-- Remove the bolts -arrows- and remove the connection -2-.

-- Free up the wires for the heated oxygen sensors.

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-- Loosen the screw-type clamp -arrow-, press the catalytic converter to the right side.

-- Remove the bolts -arrows- and remove the heat shield -1-.

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-- Pry out the locking plates -arrows- and dispose.

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-- Remove the bolt -1- and then remove the coolant return line.

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-- Remove the bolt -2- and the oil supply line.

-- Remove the nuts -arrows-.

-- Remove the turbocharger from the threaded pins in the -direction of the arrow-.

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-- Have a second technician hold the turbocharger.

-- Remove the bolt -1- and the coolant supply line -2-, to do so push the heat shield to the side.

-- Remove the turbocharger upward.