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Home >> Audi >> 2018 >> S4 Prestige >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head, VALVETRAIN [CVKB, DBPA, CWNA, CVLA, DEMA, DHDA, DKUA] >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Cylinder Head, Removing And Installing >> Removing

Cylinder Head, Removing And Installing: Removing

Depending on the model preliminary work may be required. Refer to CYLINDER HEAD, REMOVING AND INSTALLING [CVKB, DBPA, CWNA, CVLA, DEMA, DHDA] .

NOTE:

During installation, all cable ties must be installed at the same location.

-- Disconnect the ground cable from the battery terminal. Refer to BATTERY, DISCONNECTING AND CONNECTING .

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

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

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

-- Remove the nut -arrow- and move the bracket -1- and wiring harness to the side.

GWWA10-12052Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -2-.

GWWA21-10720Courtesy of AUDI OF AMERICA, LLC
NOTE:

Place a cloth underneath to catch any escaping engine oil.

-- Remove the bolt -1- and then remove the oil return hose.

-- Remove the heat shield -arrows-.

GWWA21-10715Courtesy of AUDI OF AMERICA, LLC

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

GWWA21-10716Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows-, and remove the turbocharger from the stud bolts.

-- Remove the right coolant pipe bolts -arrows-.

GWWA19-12328Courtesy of AUDI OF AMERICA, LLC

-- Remove the connectors -2 and 3- from the bracket and disconnect.

GWWA15-11643Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors -4 and 5-.

-- Remove the bolts -1- from the bracket.

-- Disconnect the connectors -1, 2 and 3-.

GWWA15-11788Courtesy of AUDI OF AMERICA, LLC

-- Remove the nut -2- and bolt -1- and remove the intake manifold support.

GWWA15-11644Courtesy of AUDI OF AMERICA, LLC

-- If necessary, release and disconnect the connector for the Fuel Pressure Sensor -G247- with the :T10118  .

Fig 1: Locating Fuel Pressure Sensor
GWWA24-11092Courtesy of AUDI OF AMERICA, LLC

Vehicles with Generator:

GWWA17-10751Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors and free up the wires.

1  - For Oil Pressure Switch -F22- -2-

3  - For Reduced Oil Pressure Switch -F378- -4-

5  - For Piston Cooling Nozzle Control Valve -N522- -7-

Vehicles with Starter Generator: 

GWWA17-11117Courtesy of AUDI OF AMERICA, LLC

-- Disconnect The Connectors: 

  1. For the Oil Pressure Switch -F22-
  2. For the Reduced Oil Pressure Switch -F378-
  3. For the Piston Cooling Nozzle Control Valve -N522-

Continuation for All Vehicles: 

GWWA15-11789Courtesy of AUDI OF AMERICA, LLC

-- Loosen the hose clamp -1- and remove the rear coolant hose.

-- Disconnect the connector -2- for the Engine Coolant Temperature Sensor -G62-.

-- Remove the spark plugs with the :3122B  .

GWWA28-10143Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows-.

Fig 2: Cylinder Head Loosening Sequence
GWWA15-11209Courtesy of AUDI OF AMERICA, LLC

-- Remove the cylinder head bolts with the :T10070  or :T40270  in the sequence -1 through 10-.

NOTE:

Check if all hose and line connections are loosened.

-- Remove the cylinder head.

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

NOTE:

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