Cylinder Head Bank 2 (Left), Removing, 2.9L Engine

Special tools and workshop equipment required 

• Engine Bung Set: VAS6122 
  Fig 1: Engine Bung Set

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• Socket: T10405 
  Fig 2: Identifying Socket T30

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Procedure 

Depending on the model preliminary work may be required: CYLINDER HEAD .

-- 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), 2.9L ENGINE .

Audi A6/A7 without Electrical Compressor:

-- Bring the engine mount into the installation position and install the bolts all the way.

Audi A6/A7 with Electrical Compressor:

-- Bring the engine support and engine mount into the installation position and install the bolts all the way.

-- Move the subframe into the installation position and tighten the bolts to 115 Nm.

-- Lower the engine on the engine mount.

-- Remove the extractor. Refer to ASSEMBLY MOUNTS - 3.0L .

Continuation for All: 

-- Remove the coolant pipes. Refer to COOLANT PIPES .

• Front Coolant Pipe
• Left Front Coolant Pipe

-- Remove the oil dipstick tube -2- from the belt pulley side sealing flange.

Fig 3: Cylinder Bank 2 (Left) Coolant Ventilation Line, Installing

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-- Remove the bolt -arrow- and remove the bleeder line -3- from the cylinder head.

-- Disconnect the vacuum hose -1- at the same time do not damage it.

-- 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 and 9-.

Fig 4: Cylinder Head Bolts Loosening Sequence

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-- Loosen the cylinder head bolts in the sequence -1 to 8-.

-- 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 cleaning cloth or with completely clean plugs from the Engine Bung Set: VAS6122  .

• To replace the bolt -left lower arrow- ; remove the left intake manifold. Refer to INTAKE MANIFOLD, REMOVING AND INSTALLING .