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Home >> Audi >> 2017 >> A3 Premium, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 28 (CYLINDER HEAD, VALVETRAIN (4-Cylinder Direct Injection 1.8L; 2.0L 4V TFSI Engine) -- (A3 SEDAN)) >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Cylinder Head, Removing And Installing >> Removing

Cylinder Head, Removing And Installing: Removing

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NOTE:

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

Cover the opening of the transmission with a cloth, so that no coolant enters the clutch housing.

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

CAUTION:

Risk of damaging valves and piston crowns.

  • Do not turn the crankshaft if the camshaft has been removed.

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

-- Bring the engine support and engine mount into the installation position and tighten the bolts to 20 Nm.

-- Remove the engine support.

-- Remove the connector -2- from the bracket, disconnect it and free up the wires.

GWWA24-11137Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -2- and the screw-type clamp.

GWWA26-10998Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -1 and 3- and move the catalytic converter to the side.

NOTE:

The installation position is shown in the illustration with the engine removed for clarity.

-- Remove the Heated Oxygen Sensor -G39-. Refer to HEATED OXYGEN SENSOR, REMOVING AND INSTALLING .

-- Remove the bolt -arrow- on the left and right.

GWWA23-10689Courtesy of AUDI OF AMERICA, LLC

-- Unclip and remove the lower section -1- of the air duct.

-- Loosen the hose clamp -2- and remove the air duct hose from the charge air cooler.

GWWA21-10489Courtesy of AUDI OF AMERICA, LLC

-- Seal the open lines and connections with clean plugs from the :VAS6122  .

-- Loosen the hose clamp -2-.

GWWA21-10610Courtesy of AUDI OF AMERICA, LLC

-- Free up the coolant hose -3-.

-- Remove the bolts -arrows-.

-- Disconnect the connector -1- on the Charge Air Pressure Sensor -G31-.

-- Remove the right air duct pipe.

-- Loosen the hose clamps -arrows- and remove the coolant hoses.

GWWA19-11614Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Risk of damaging the coolant line.

  • Do not change the shape of the coolant line.

-- Pivot the coolant line -1- to the side.

-- Disconnect the connectors:

GWWA17-10751Courtesy of AUDI OF AMERICA, LLC

1 - For the Oil Pressure Switch -F22-

2 - For the Reduced Oil Pressure Switch -F378-

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

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

GWWA19-11612Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -1- and the nut -3- and then remove the bracket -2- for the intake manifold.

GWWA24-11159Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors:

GWWA15-11484Courtesy of AUDI OF AMERICA, LLC
  1. For the Throttle Valve Control Module -J338-
  2. For the Intake Air Temperature Sensor - G42- /Manifold Absolute Pressure Sensor -G71-
  3. Version with MPI injection: for Low Fuel Pressure Sensor -G410-

-- Remove the connector -4- from the bracket.

-- Free up the wiring harness and push it to the side.

-- Loosen the hose clamp -1-, remove the air duct hose from the charge air cooler.

GWWA21-10488Courtesy of AUDI OF AMERICA, LLC

-- Variation: free up the secondary air injection hose -3- or the coolant hose.

GWWA21-10825Courtesy of AUDI OF AMERICA, LLC

-- Free up the wiring harness -1 and 2- from the air duct pipe.

-- Loosen the screw-type clamp -4-.

-- Remove the bolts -arrows- and remove the air duct pipe.

Version with Secondary Air System: 

GWWA10-11993Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors -1 and 3-.

-- Press the release buttons on both sides and remove the secondary air injection pipe -2-.

Continuation for All Vehicles:

GWWA15-11485Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -3- for Knock Sensor 1 -G61- from the bracket.

-- Disconnect the connectors -2 and 4-.

-- Disconnect the connectors and free up the wires.

GWWA15-11486Courtesy of AUDI OF AMERICA, LLC
  1. For the Intake Manifold Runner Control Valve -N316-
  2. For the Coolant Shut-Off Valve -N82-
  3. For Engine Coolant Temperature Sensor -G62-
  4. For the Oil Pressure Switch, Level 3 -F447-

-- Remove the bolts -arrows-.

-- Remove the bolts -arrows- and nut -1-.

GWWA21-10810Courtesy of AUDI OF AMERICA, LLC

-- Remove the heat shield -2-.

-- Remove the bolt -1-. Only loosen the bolt -3-.

GWWA21-10811Courtesy of AUDI OF AMERICA, LLC

-- Remove the turbocharger bracket -2-.

-- Remove the nuts -arrows-.

GWWA21-10812Courtesy of AUDI OF AMERICA, LLC

-- Remove the turbocharger from the cylinder head and tie up toward the rear.

All additional procedures are described. Refer to CYLINDER HEAD .