Cylinder Head, Installing: Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Audi S8, 2015 Audi A8 Quattro, 2014 Audi S8, 2014 Audi A8 Quattro, and 2013 Audi S8. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

The sealing surfaces could be damaged.

Carefully remove sealant residue from cylinder head and cylinder block.
Make sure that no long scrapes or scratches result.

Risk of damaging cylinder block.

No oil or coolant must be in the cylinder head bolt blind holes in the cylinder block.

Risk of leaks in cylinder head seal.

Carefully remove sealant residue from cylinder head and cylinder block. Make sure that no long scrapes or scratches result.
Carefully remove all grinding and sanding residue.
Only unpack new cylinder head gasket immediately prior to installation.
To prevent cylinder head seal silicone layer and recessed area from being damaged, always handle seal extremely carefully.

Risk of damaging open valves.

If a replacement cylinder is installed, only remove plastic base right before cylinder head is installed to protect open valves.

Risk of damaging valves and piston heads after working on valve train.

To ensure valves do not strike pistons when starting, carefully rotate engine at least two full revolutions.

NOTE:

Replace any bolts that were tightened with an additional turn.

Replace seals, gaskets and O-rings.

When installing a replacement cylinder head, coat the contact surfaces between the hydraulic adjusting elements, the roller rocker levers and the cam running surfaces with oil.

Secure all hose connections with hose clamps appropriate for the model.

It is necessary to replace all the coolant and engine oil whenever the cylinder head or the cylinder head gasket are replaced.

NOTE:

The cylinder head for cylinder bank 2 (left) is shown in the illustration.

Fig 1: Identifying Alignment Bushings In Cylinder Block

Courtesy of AUDI OF AMERICA, LLC

-- If there are no alignment bushings -arrows- at the locations marked in the cylinder block, insert them.

-- Install the cylinder head gasket on the alignment bushings in the cylinder block.

Cylinder head gasket installation position: "oben" (top) marking or part number toward cylinder head.

-- Set cylinder head in place.

-- Install the cylinder bolts by all the way in by hand.

-- Tighten the cylinder head bolts, refer to Figure.

NOTE: There is no requirement to tighten the cylinder head bolts after repairs.

Cylinder Bank 1 (Right):

Fig 2: Identifying Locking Pin T40071 And Screwdriver

Courtesy of AUDI OF AMERICA, LLC

-- Press the right camshaft timing chain tensioner guide rails in as far as the stop using a screwdriver -1- and secure the chain tensioner with a Locking Pin T40071.

NOTE:

The toothed belt tensioner is lubricated with oil and should only be compressed slowly by applying constant pressure.

The procedure is shown with the camshaft installed.

Cylinder Bank 2 (Left):

Fig 3: Identifying Locking Pin T40071 And Screwdriver

Courtesy of AUDI OF AMERICA, LLC

-- Press the left camshaft timing chain tensioner guide rails in as far as the stop using a screwdriver -1- and secure the chain tensioner with a Locking Pin T40071.

NOTE:

The toothed belt tensioner is lubricated with oil and should only be compressed slowly by applying constant pressure.

The procedure is shown with the camshaft installed.

Continued for Both Sides:

The rest of the installation is performed in reverse order of removal, noting the following:

-- Install the engine support and engine mount, refer to OVERVIEW - SUBFRAME MOUNT .

-- Install the wires, refer to COMPONENT LOCATION OVERVIEW - RELAY PANELS, FUSE PANELS AND E-BOXES and => Wiring Diagram.

-- Install the Knock Sensor 3 -G198-, refer to KNOCK SENSOR 3 -G198-, REMOVING AND INSTALLING .

-- Install the camshafts, refer to INSTALLING .

-- Install the turbocharger, refer to TURBOCHARGER, REMOVING AND INSTALLING .

-- Install the front bumper cover, refer to BUMPER COVER, REMOVING AND INSTALLING .

-- Change the engine oil, refer to ENGINE OIL, DRAINING/EXTRACTING AND REMOVING AND INSTALLING FILTER and ENGINE OIL LEVEL, FILLING AND CHECKING 410.

-- Replace the coolant, refer to COOLANT, DRAINING AND FILLING .