Cylinder Head Bank 2 (Left), Removing

Special tools and workshop equipment required 

• Engine Bung Set: VAS6122 
• Hose Clip Pliers: VAS6340 
• Socket - T30: T10405 

Procedure 

-- Remove the left camshaft housing. Refer to CYLINDER BANK 2 (LEFT) CAMSHAFT HOUSING, REMOVING AND INSTALLING .

-- Remove the left turbocharger. Refer to TURBOCHARGER, REMOVING, CYLINDER BANK 2 (LEFT) .

-- Remove the ribbed belt from the A/C compressor. Refer to A/C COMPRESSOR RIBBED BELT, REMOVING AND INSTALLING .

Audi RS6 / RS7: 

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-- Remove the A/C compressor. Refer to A/C COMPRESSOR, REMOVING AND INSTALLING .

-- Disconnect the connection -2- for Throttle Valve Control Module 2 - GX4-.

-- Remove the bolt -1- and free up the retaining washer.

Audi A8 / S8 / RSQ8 / SQ8 / SQ7: 

-- Equipment version with refrigerant R134a/R1234yf without active suspension: remove the A/C compressor from the bracket and tie it up to the side. Refer to A/C COMPRESSOR, REMOVING AND INSTALLING FROM BRACKET .

-- Versions with refrigerant R744 with active suspension: remove the A/C compressor. Refer to A/C COMPRESSOR, REMOVING AND INSTALLING .

-- Disconnect the connectors:

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2 - For the Charge Air Pressure Sensor 2 -G447-

3 - For the Throttle Valve Control Module 2 -GX4-

-- Loosen the hose clamp -1- and remove the crankcase ventilation hose.

-- Remove the bolt -arrow- and free up the retaining washer.

-- Loosen the hose clamp -4- and remove the air duct hose.

All: 

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-- Disconnect the connectors:

2 - For the Crankcase Ventilation Thermal Resistor 2 -N483-

3 - For the Manifold Absolute Pressure Sensor 2 -G429-

5 - For Wastegate Bypass Regulator Valve 2 -N274-

-- Remove the charge air pressure actuator from the bracket and free up and move it to the side.

-- Remove the crankcase ventilation pipe -1- to do so press the release buttons on both sides.

-- Disconnect the vacuum hose -4- by pressing the release buttons on both sides.

-- Free up the wires on the intake manifold.

-- Remove the bolt -1- and remove the coolant ventilation line -2- from the cylinder head.

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-- Remove the bolts -3- and the chain tensioner -4-.

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-- Remove the guide rail bolt -5-.

-- If the cylinder head is removed with the engine installed: push the tensioning rail -2- upward in direction of -arrow- and secure using a cable tie to the camshaft timing chain -1- as shown.

-- Remove the bolts -arrows-. 

Fig 1: Cylinder Head Bank 2 (Left) Bolts Loosening Sequence

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-- Loosen the cylinder head bolts in the sequence -1 to 10-.

-- Remove the bolts and the cylinder head carefully.

-- Lay the cylinder head on a soft surface, such as foam.

-- Seal the open channels of the intake and exhaust tract with a clean cloth or with completely clean plugs from the : VAS6122  .