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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 >> VALVETRAIN >> Valve Stem Seals, Removing And Installing >> Valve Stem Seals, Removing And Installing, Cylinder Head Installed >> Removing

Valve Stem Seals, Removing And Installing, Cylinder Head Installed: Removing

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

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

GWWA28-10143Courtesy of AUDI OF AMERICA, LLC

-- Set the piston for the respective cylinder to "bottom dead center (BDC)".

-- Position the :VAS5161/3A  on the valve spring plate and loosen the stuck valve retainers with a plastic mallet.

Fig 1: Identifying Valve Cotter Tool Kit - Punch VAS 5161/3
GWWA15-11359Courtesy of AUDI OF AMERICA, LLC

-- Check if the opening -arrow- is present.

Fig 2: Identifying Valve Cotter Tool Kit - Guide Plate 19cVAS5161/19C
GWWA15-11800Courtesy of AUDI OF AMERICA, LLC

-- If necessary, rework the :VAS5161/19C  -arrow- until the guide plate touches the cylinder head and the guide pin -1- is free.

-- Secure the guide plate with the :VAS5161/12  .

Fig 3: Placing Valve Cotter Tool Kit - Guide Plate 19C VAS 5161/19C On Cylinder Head
GWWA15-11341Courtesy of AUDI OF AMERICA, LLC

-- Install the :T40012  in the spark plug threads.

-- Connect the adapter to the compressed air using a commercially available intermediate piece and give steady pressure.

-- Install the :VAS5161/6  with the :VAS5161/5  in the guide plate.

Fig 4: Identifying Valve Cotter Tool Kit - Guide Plate 19c VAS5161/19C
GWWA15-11360Courtesy of AUDI OF AMERICA, LLC

-- Push the :VAS5161/8A  into the guide plate.

-- Engage the :VAS5161/2  at the engaging device and press the installation cartridge downward.

-- At the same time, turn the installation cartridge knurled bolt right until points engage in the valve retainers.

-- Move the knurled bolt left and right slightly. This presses the valve retainers apart and captures them in the assembly cartridge.

-- Release the pressure fork.

-- Remove the assembly cartridge.

-- Remove the guide plate and turn it aside.

-- Remove the valve spring and the valve spring retainer.

-- Remove the valve stem seal with the :3364  .

Fig 5: Identifying Valve Seal Removal Tool 3364
GWWA15-11316Courtesy of AUDI OF AMERICA, LLC