Cylinder Head, Removing And Installing: Removing

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 Audi Q5, 2016 Audi Q5, 2015 Audi Q5, 2014 Audi Q5, and 2013 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

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

Always seal off any open channels in the intake and exhaust tract with suitable plugs. For example, from the Engine Bung Set VAS6122.

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

CAUTION:

Risk of damaging valves and piston crowns.

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

-- Remove the front noise insulation, refer to OVERVIEW - NOISE INSULATION .

WARNING:

Risk of scalding due to hot steam and hot coolant.

The coolant system is under pressure when the engine is warm.
Reduce pressure by covering coolant reservoir cap with a cloth and carefully opening.

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

-- Remove the front muffler, refer to FRONT MUFFLER, REMOVING AND INSTALLING, NON-HYBRID VEHICLES .

Fig 1: Disconnecting Fuel Supply Hose -1-

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WARNING:

Risk of injury from fuel.

To reduce fuel pressure, lay cloths around connecting point before opening fuel system and carefully loosen.

CAUTION:

Risk of contamination to the fuel system.

Note the rules of cleanliness for working on the fuel injection system, refer to CLEAN WORKING CONDITIONS .

-- Press the release ring and disconnect the fuel supply hose -1-.

-- Remove the hose -2- from the Evaporative Emission (EVAP) canister.

-- Remove the tower brace, refer to TOWER BRACE, REMOVING AND INSTALLING .

Fig 2: Identifying Strut Tower Brace, Bolts -1- And Nuts -2-

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-- Perform a service position, refer to SERVICE POSITION, PERFORMING AND RESETTING .

-- Loosen the hose clamps -arrows- and remove the air guide hose.

Fig 3: Identifying Air Intake Hose Components

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-- Disconnect the following connectors.

Fig 4: Identifying Connectors

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From the Intake Air Temperature Sensor -G42-.
Disconnect from the Knock Sensor 1 -G61- and free up.
If installed: from the EVAP Canister System Pressure Sensor -G804-.
From the EVAP Canister Purge Regulator Valve 1 -N80-
From the Intake Manifold Runner Control Valve - N316-, Fuel Pressure Sensor -G247- and Camshaft Position Sensor - G40-.
From the fuel injectors
From the Throttle Valve Control Module -J338-.

Non-Hybrid Vehicles

Fig 5: Generator Electrical Connector And Terminal B+

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-- Disconnect the connector -2- and free up the wire.

Hybrid Vehicles

Fig 6: Identifying Coolant Lines -Arrows- With -3094- & Bolts -2- & After-Run Coolant Pump -1

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-- Remove the bolts -2- from the bracket for the After-Run Coolant Pump -V51- and then move the After-Run Coolant Pump -V51- and bracket to the side.

CAUTION:

Hazardous high voltage

Severe bodily injury or death by electrocution.

The high voltage system may only be turned off by a qualified person (Audi high voltage technician).
It must be certain that the voltage for the high voltage system is turned off. The voltage is guaranteed to be off exclusively with the Vehicle Diagnostic Tester via the "Guided Fault Finding".
The qualified technician (Audi high voltage technician) will make sure the voltage is turned off and that the system cannot turn back on again using Service Disconnect Lock T40262. The qualified technician should make sure the system cannot turn on again by keeping the key and the High Voltage System Maintenance Connector -TW- in a safe place.
The qualified personnel (Audi high voltage technicians) mark the vehicle with a label.

NOTE:

De-energizing the high voltage system:

Connect the Vehicle Diagnostic Tester

Select the Guided Fault Finding mode

Using the Go To button, move through the following menu points

Function/Component Selection

Body

Electrical Equipment

OBD-Capable System

8C- Hybrid Battery Management -J840

8C - Hybrid Battery Management, Functions

51 - De-Energize the High Voltage

-- Remove the Electrical A/C Compressor -V470- from the auxiliary components bracket and tie it up on the left side, refer to A/C COMPRESSOR, REMOVING AND INSTALLING ON BRACKET, ELECTRICALLY-DRIVEN A/C COMPRESSOR , or A/C COMPRESSOR, REMOVING AND INSTALLING, ELECTRICALLY-DRIVEN A/C COMPRESSOR .

WARNING:

Refrigerant can cause serious personal injury.

Do not open the Air Conditioning (A/C) system refrigerant circuit.

CAUTION:

Risk of damaging refrigerant lines and hoses.

Do not stretch, kink or bend refrigerant lines and hoses.

Vehicles with Secondary Air Injection System

Fig 7: Secondary Air Injection System harness connector (If Equipped)

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-- Disconnect the connectors -arrows-.

Coolant Hose Version 1

Fig 8: Coolant Hose Clamps Version 1

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-- Open the clamps -arrows- and remove the rear coolant hoses.

Coolant Hose Version 2

Fig 9: Coolant Hose Clamps Version 2

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-- Lift the clip -1-, loosen the clamp -2- and remove the rear coolant hoses.

Continuation for All Vehicles

Fig 10: Front Coolant Pipe

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NOTE:

Lay a cloth below the coolant pipe to catch escaping coolant.

-- Remove the bolts -1 and 2- and move the front coolant pipe upward.

-- Loosen the clamp -left arrow- and remove the coolant hose.

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

Fig 11: Identifying Intake Manifold Bracket Mounting Nut & Bolt

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-- Remove the banjo bolts -1 and 2- and bolts -3- and then move the lines to the side.

Fig 12: Identifying Banjo Bolts -1 And 2- And Bolts -3-

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-- Remove the nuts -arrows- and push the catalytic converter to the rear.

Fig 13: Identifying Nuts

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Non Hybrid Vehicles Version 1

Fig 14: Identifying Oil Pressure Switch

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-- Disconnect the connectors -1 and 4- from the Oil Pressure Switch - F22- and Reduced Oil Pressure Switch - F378-.

NOTE:

Ignore items -2 and 3-.

Non Hybrid Vehicles Version 2

Fig 15: Identifying Connectors From Oil Pressure Switch And Reduced Oil Pressure Switch

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-- Disconnect the connectors -2 and 3- from the Oil Pressure Switch - F22- and Reduced Oil Pressure Switch - F378-.

NOTE:

Ignore items -1 and 4-.

Hybrid Vehicles

Fig 16: Locating Oil Pressure Switch -F22- And Reduced Oil Pressure Switch -F378-

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-- Disconnect the connectors -1 and 2- from the Oil Pressure Switch -F22- and Reduced Oil Pressure Switch - F378-

Vehicles with Secondary Air Injection System

Fig 17: Secondary Air Hose (Hybrid Vehicles)

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-- Remove the secondary air hose -arrow- by pressing the release buttons.

Continuation for All Vehicles

Fig 18: Disconnect Connectors

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-- Disconnect the connectors -1 and 2- and free up the electric wire.

-- Loosen the hose clamp -arrow-, pull of the air guide hose and move it to the side.

Fig 19: Identifying Hose Clamp

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-- Disconnect the connector from the Oil Level Thermal Sensor - G266- -arrow-.

Fig 20: Disconnecting Connector For Oil Level Thermal Sensor -G266-

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-- Loosen the bolts -1- from above.

Fig 21: Identifying Bolts

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-- Remove the bolt -2- from below.

-- Remove the bolts -arrows- on the oil return line.

Fig 22: Identifying Bolts

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-- Remove the bolts -arrows-.

Fig 23: Cylinder Head Loosening Sequence

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-- Remove the cylinder head bolts with the Polydrive Bit Drive Socket T10070 in the order -1 through 10-.

NOTE:

Make sure all wires and cables are disconnected.

Pay attention to the tension and guide tracks when lifting the cylinder head.

-- Remove the cylinder head.

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