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Home >> Audi >> 2020 >> S4 Prestige >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head, VALVETRAIN [CVKB, DBPA, CWNA, CVLA, DEMA, DHDA, DKUA] >> 15 Cylinder Head, VALVETRAIN >> VALVETRAIN >> Camshaft, Removing And Installing >> Removing

Camshaft, Removing And Installing: Removing

NOTE:

The cylinder head cover sealing surfaces on the cylinder head must not be worked on.

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

-- Remove the noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

-- Remove the upper timing chain cover. Refer to UPPER TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Remove the air filter housing. Refer to OVERVIEW - AIR FILTER HOUSING [4-Cylinder Direct Injection 2.0L 4V TFSI Engine] / AIR FILTER HOUSING, REMOVING AND INSTALLING [4-Cylinder Direct Injection 2.0L 4V TFSI Engine] .

-- Disconnect The Connectors: 

GWWA15-11380Courtesy of AUDI OF AMERICA, LLC
  1. For Charge Air Pressure Actuator -V465-
  2. For Turbocharger Recirculation Valve -N249-

-- If installed, disconnect the connector -2- for the Oxygen Sensor after Catalytic Converter -G130- -1- and free up the wires. (There are different installation positions.)

Fig 1: Component location Oxygen Sensor after Catalytic Converter -G130- with Heater for Oxygen Sensor 1 after Catalytic Converter -Z29-
GWWA24-11366Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors and free up the wires.

GWWA15-11791Courtesy of AUDI OF AMERICA, LLC
  1. For Camshaft Position Sensor 3 -G300-
  2. For Heated Oxygen Sensor -G39-, to do so remove it from the bracket
  3. For EVAP Canister Purge Regulator Valve 1 -N80-

-- Remove the ignition coils with power output stages. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

-- Disconnect the connector -2- from the cam adjustment actuator.

GWWA15-11794Courtesy of AUDI OF AMERICA, LLC

-- Free up the vacuum hose -1- and the wire.

GWWA15-11896Courtesy of AUDI OF AMERICA, LLC

-- Release the catches in direction of -arrows-, remove the wiring duct -2- with the wiring harness and move to the side.

-- Loosen the hose clamp -2- and disconnect the hose for the EVAP system.

GWWA10-12047Courtesy of AUDI OF AMERICA, LLC

-- Lift the clip -3-, disconnect the coolant line -2- and free up from the cylinder head and push it toward the right side.

GWWA15-11793Courtesy of AUDI OF AMERICA, LLC

-- Remove the vacuum hose -4- and disconnect the vacuum line -1- for the Intake Manifold Runner Control Valve - N316- and free up from the cylinder head.

-- Remove the oil separator. Refer to OIL SEPARATOR, REMOVING AND INSTALLING .

-- Remove the high pressure pump. Refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .

-- Remove the vacuum pump. Refer to VACUUM PUMP, REMOVING AND INSTALLING / VACUUM PUMP, REMOVING AND INSTALLING [CYMC, DFVA, CWGD, DBPA, DECA] .

-- Remove the camshaft timing chain. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .

-- Install the :T10531/3  . In the "TDC point" the flat area -1- points upward. Install the :T10531/4  . Turn the crankshaft with a 32 mm open end wrench 90° counter-clockwise out of "TDC".

Fig 2: Identifying Assembly Tool - Turning Over Tool T10531/3
GWWN15-10976Courtesy of AUDI OF AMERICA, LLC

-- Lock the intake camshaft pretension using the :T40266  in the direction of -arrow 1-, pull the :T40271/2  from the chain sprocket splines in the direction of -arrow 2- and bring the camshaft into the rest position.

Fig 3: Identifying Adapter T40266 And Intake Camshaft
GWWA15-11387Courtesy of AUDI OF AMERICA, LLC

-- Lock the exhaust camshaft pretension using the :T40266  in the direction of -arrow 1-, pull the :T40271/1  from the chain sprocket splines in the direction of -arrow 2- and bring the camshaft into the rest position.

Fig 4: Identifying Camshaft Locating Tool T40271/1
GWWA15-11388Courtesy of AUDI OF AMERICA, LLC

-- Remove the cylinder head cover bolts in -1 to 6- sequence.

Fig 5: Cylinder Head Cover Bolt Loosening Sequence
GWWA15-11493Courtesy of AUDI OF AMERICA, LLC

-- Carefully loosen the cylinder head cover -2- from the bonding with a screwdriver -1- and remove it together with the camshafts.

GWWA15-12197Courtesy of AUDI OF AMERICA, LLC
NOTE:

Pay attention that the camshafts do not fall out of the cylinder head cover.

-- Remove the camshaft and cover the open engine components.

-- If necessary for continuing work: Mark the roller rocker lever and hydraulic lifter for reinstallation, remove them and place on a clean surface.