Cylinder Head, Removing And Installing: Installing

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2020 Audi S4, 2020 Audi A4, 2019 Audi S4, 2019 Audi A4, and 2018 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

There is a risk of damaging the sealing surfaces.

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

Risk of damaging the cylinder block.

There must be no oil or coolant in the blind holes for the cylinder head bolts in the cylinder block.

Risk of the cylinder head gasket leaking.

Carefully remove all lapping and sanding residue.
Only unpack the new cylinder head gasket immediately before installing.
To prevent the cylinder head gasket silicone layer and recessed area from being damaged, always handle the gasket extremely carefully.

There is a risk of damaging open valves.

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

NOTE:

Replace the bolts that were tightened with an additional turn after removing them.

Replace the self-locking nuts, gaskets, seals and O-rings after removal.

If a replacement cylinder head is being installed, the contact surfaces between the hydraulic lifters, the roller rocker levers and the cam running surfaces must be oiled.

Secure all hose connections with hose clamps that match the ones used in series production. Refer to the Parts information.

When replacing the cylinder head or cylinder head gasket, replace all of the coolant and engine oil.

-- Position the cylinder head gasket.

Pay attention to centering pins in cylinder block -arrows-.

Fig 1: Identifying Centering Pins
Courtesy of AUDI OF AMERICA, LLC
Pay attention to the cylinder head gasket installation position: The part number must be readable from the intake side.

-- If the crankshaft was turned in the meantime: Bring the piston for cylinder 1 to TDC and then turn the crankshaft another 90° counter-clockwise out of "TDC".

-- Position the cylinder head.

-- Insert the cylinder head bolts and tighten by hand.

-- Cylinder head tightening sequence. Refer to Figure.

NOTE:

It is not required to retighten the cylinder head bolts after repairs.

-- Install the camshafts. Refer to CAMSHAFT, REMOVING AND INSTALLING .

-- Install the Throttle Valve Control Module -GX3-. Refer to THROTTLE VALVE CONTROL MODULE -GX3-, REMOVING AND INSTALLING .

-- Connections and wire routing. Refer to Wiring Diagram(s).

-- Follow all steps after connecting the battery. Refer to BATTERY, DISCONNECTING AND CONNECTING .

-- Install the spark plugs. Refer to OVERVIEW - IGNITION SYSTEM

-- Change the engine oil. Refer to ENGINE OIL

-- Change the coolant. Refer to COOLANT, DRAINING AND FILLING .

Additional procedures depending on the model. Refer to CYLINDER HEAD, REMOVING AND INSTALLING [CVKB, DBPA, CWNA, CVLA, DEMA, DHDA] .