Engine, Removing

WARNING: This page is about a different car, the 2016 Audi A8 Quattro and 2015 Audi A8 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Pry Lever:80 - 200
Used Oil Collection and Extraction Unit:SMN372500
Step Ladder:VAS5085
Engine Bung Set:VAS6122
Scissor Lift Table:VAS6131B with Scissor Lift Table - Audi Set:VAS6131/10 , Scissor Lift Table - A8 Set :VAS6131/11 and Scissor Lift Table - Q7 Set :VAS6131/13
Shop Crane - Drip Tray:VAS6208
Hose Clamps - Up To 25 mm:3094
Hose Clip Pliers:VAS6340
Hose Clip Pliers:VAS6362
Locking Pin:T10060A
Torx Socket - T60:T40087

Procedure

NOTE:

With the lock carrier installed, the engine is removed downward together with the transmission and the subframe.

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

WARNING:

Risk of vehicle tipping over with engine removed.

The luggage compartment must be empty to secure the vehicle.

-- Position the front wheels so they are straight.

Fig 1: Disconnecting Battery

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CAUTION:

Risk of destroying the electronic components.

Follow the steps for disconnecting the battery.

-- Switch off the ignition.

-- Disconnect the ground cable -2- from the battery terminal. Refer to Battery, Disconnecting and Connecting .

Vehicles through MY 2013:

-- Extract the power steering fluid from the reservoir using the :SMN372500 .

Continuation for All Vehicles:

Fig 2: Identifying Engine Cover

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-- Carefully pull the engine cover off the retaining pins one after the other in direction of -arrows-. Do not pull sharply on the engine cover or pull it to one side.

-- Remove the lock carrier cover -2-. Refer to .

Fig 3: Bolts And Pull Air Guide Off Air Filter Housing

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Fig 4: Engine At Operating Temperature

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WARNING:

Risk of scalding due to hot steam and hot coolant.

The cooling system is under pressure when the engine is warm.
Cover the coolant expansion tank cap with a cloth and carefully open it to reduce the pressure.

-- Open the coolant reservoir cap -arrow-.

-- Completely remove the left and right front wheel housing liners. Refer to NOISE INSULATION .

Fig 5: Identifying Connector For Oxygen Sensor After Three Way Catalytic Converter And Bracket

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-- Remove the noise insulation -1 and 2-. Refer to Noise Insulation, Removing and Installing .

Fig 6: Identifying Front Noise Insulation

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-- Remove the left and right front underbody trim panels -2-. Refer to Underbody Trim Panels, Removing and Installing .

Fig 7: Identifying Left And Right Lower Longitudinal Member

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-- Loosen the left and right lower longitudinal members and leave in the installation position. Refer to Lock Carrier, Removing and Installing .

AWD Vehicles:

Fig 8: Counter Hold Rear Driveshaft Using Counterhold Tool T10172 And Adapters T10172/5

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-- Remove the driveshaft. Refer to DRIVESHAFT ATTACHED ON TRANSMISSION SIDE .

Vehicles through MY 2013:

Fig 9: Connect Coolant Hose To Left Coolant Pipe At Hose Clamp -2-

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NOTE:

Collect escaping coolant in a clean container for disposal.

-- Loosen the clamp -2-, remove the coolant hose from the left front coolant pipe and let the coolant drain out.

NOTE:

Ignore -1-.

Vehicles from MY 2014:

Fig 10: Coolant Hose From The Left Front Coolant Pipe

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-- Loosen the clamp -arrow-, remove the coolant hose from the lower left coolant pipe and let the coolant drain out.

Continuation for All Vehicles:

Fig 11: Draining Coolant Out From Right Lower Coolant Hose

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-- Free up the wire for the Engine Coolant Temperature Sensor on Radiator Outlet -G83- -1-.

-- Lift the clamp and let the coolant drain out to remove the lower right coolant hose -2- from the radiator.

-- Remove the right rear coolant hose -arrow-, lift the clamp, and drain the coolant.

Fig 12: Identifying Hose Connection

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Vehicles through MY 2013:

Fig 13: Identifying Suction Hose And Return Hose

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-- Clamp off the hydraulic hoses -1 and 2- from the hydraulic fluid reservoir with :3094 .

NOTE:

Place a cloth underneath to catch the draining hydraulic fluid.

Fig 14: Identifying Clamp

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-- Loosen the clamp -arrow- and remove the hydraulic hose.

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

Continuation for All Vehicles:

Fig 15: Identifying Air Guide Pipe And Clamp

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-- Loosen the hose clamps -arrows- and remove the air duct pipe -1-.

Fig 16: Identifying Hose Clamps -1, 2 and 3

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CAUTION:

There is a risk of contamination.

Follow the guidelines for clean working conditions when working on the fuel supply system. Refer to CLEAN WORKING CONDITIONS .

-- Mark the fuel hoses for reinstallation and remove, to do so loosen the hose clamps -1, 2 and 3-.

Vehicles with Engine Codes CTBA, CTBB, CTBD:

WARNING:

The reducing agent can cause skin irritation.

Observe the safety precautions when working with reducing agent. Refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM SAFETY PRECAUTIONS .
Wear protective eyewear.

NOTE:

To catch escaping reducing agent place a clean cloth under the separation point.

-- Disconnect the metering line -1- from the Reducing Agent Injector -N474- by pressing the release buttons.

Fig 17: Disconnecting Metering Line -1- From Reducing Agent Injector -N474- By Pressing Release Buttons -Arrows-

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Continuation for All Vehicles:

Fig 18: Identifying Upper Right Longitudinal Member

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-- Remove the right upper longitudinal member -2-. Refer to .

-- Disconnect the connector -2-.

Fig 19: Identifying Air Filter Housing

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-- Remove the air filter housing -1- upward.

-- Remove the coolant hose -arrow- by lifting the clamp.

Fig 20: Identifying Coolant Hose

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Vehicles from MY 2014:

Fig 21: Identifying Connector And Clamp

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

Continuation for All Vehicles:

-- Loosen the clamp -arrow- and remove the coolant hose from the front coolant pipe.

-- Loosen the clamp -1- and remove the air duct hose.

Fig 22: Identifying Clamp

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NOTE:

Ignore -2-.

-- Turn the tensioning element clockwise using the :T40087 -arrow- to release the tension on the ribbed belt.

Fig 23: Moving Tensioner Clockwise -Arrow- Using T40087 To Release Tension On Ribbed Belt And To Remove Ribbed Belt Using T10060A

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-- Remove the ribbed belt from the A/C compressor ribbed belt pulley and stop the tensioner with the :T10060 A .

NOTE:

A vehicle through MY 2013 is illustrated.

-- Open the hose clamp -3- and remove the air duct hose.

Fig 24: Connector At The Throttle Valve Control Module, Screw Clamp & Air Guide Hose

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Vehicles from MY 2014:

-- Disconnect the connector -1-.

NOTE:

Ignore -2-.

Vehicles through MY 2013 without Dynamic Steering:

Fig 25: Identifying Pressure Line Bolt And Intake Hose Clamp

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NOTE:

Place a cloth underneath to catch the draining hydraulic fluid.

-- Loosen the hose clamp -2- to disconnect the hydraulic hose.

-- Remove the bolts -1- and remove the hydraulic line and pivot downward.

Vehicles through MY 2013 with Dynamic Steering:

Fig 26: Bolts -1-, Clamp -2- Pressure Line, Clamp -3 Hydraulic Hose

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NOTE:

Place a cloth underneath to catch the draining hydraulic fluid.

-- Remove the union nut -1- and remove the hydraulic line from the power steering pump.

-- Open the clamp -3- and remove the hydraulic hose.

NOTE:

Ignore -2-.

Continuation for All Vehicles:

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

-- Remove the seal -1- near the plenum chamber cover.

Fig 27: Identifying Seal Near Plenum Chamber Cover

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-- Remove the plenum chamber cover -2-. Refer to BULKHEAD .

-- Release the cover -2- and pivot it to the side in direction of -arrow-.

Fig 28: Identifying Cover

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-- Remove the nut -4- and free up the positive cable.

-- Remove the nut -3- and remove the positive cable -1-.

-- Release the tabs -1 and 3- and pivot the positive terminal -2- out of the mount.

Fig 29: Identifying Positive Terminal

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-- Remove the bolts -arrows- and the engine compartment E-box cover -1- on the right side.

Fig 30: Identifying Engine Compartment E-Box Cover Bolts

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-- Disconnect the connectors -1 and 2- and free up the wires.

Fig 31: E-Box Connectors

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-- Release the retainers in direction of -arrows- and remove the relay panel with the fuse panel -4-.

-- Release the retainer -5- and remove the condenser -6-.

-- Disengage and free up the engine wiring harness on the E-box in the right of the engine compartment and then lay it on the engine.

NOTE:

Ignore -3-.

-- Disconnect the vacuum hose -1- to the brake booster.

Fig 32: Identifying Coolant Line And Vacuum Line

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-- Remove the coolant hose -2- by lifting the clamp.

-- Remove the tower brace. Refer to SUSPENSION STRUT AND UPPER CONTROL ARM .

Fig 33: Identifying Tower Brace

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-- Open the clips -arrows-, remove the -J623- -2- and lay it on the engine.

Fig 34: Component Location Engine Control Module -J623-

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NOTE:

Ignore -1, 3, and 4-.

-- Remove the bolt -4- for the battery positive cable -3- and the bolt -2- for the ground cable -1- and free up the wires.

Fig 35: Identifying Battery Cables And Bolts

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FWD Vehicles:

Fig 36: Identifying Bolts

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-- Free up the right and left coolant hoses -arrows-.

-- Remove the bolts -1 and 2- and then the crossmember for the torque support.

Vehicles with Parking Heater:

Fig 37: Identifying Bolt

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-- Remove the bolt -arrow- from the bracket.

Continuation for All Vehicles:

Fig 38: Electrical Connector And Right Engine Mount Bolt

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-- Only for electrohydraulic engine mount solenoid valve version I: free up and disconnect the connector -1- for the Right Electrohydraulic Engine Mount Solenoid Valve -N145-.

NOTE:

Ignore -2-.

Vehicles from MY 2014:

Fig 39: Disconnect Connector -1- Throttle Valve Control Module -J338- Free Up Wire, Free Up -3- Wiring Harness From Cylinder Head Cover

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-- Remove the connector -1- from the bracket and disconnect it.

-- Free up the wiring harness -3- on the cylinder head cover.

NOTE:

Ignore -2-.

-- Disconnect the connector -1- from the Throttle Valve Control Module -J338- and free up the wire.

Fig 40: Connector At The Throttle Valve Control Module, Screw Clamp & Air Guide Hose

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NOTE:

Ignore -2 and 3-.

-- Disconnect the connector -1- on the Engine Temperature Control Sensor -G694- and free up the wire.

Fig 41: Component Location Engine Temperature Control Sensor -G694-

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NOTE:

Ignore -2-.

-- Only for electrohydraulic engine mount solenoid valve version II: disconnect the connector -3- on the Left Electrohydraulic Engine Mount Solenoid Valve -N144-.

Fig 42: Disconnecting Left And Right Connector -3- From Left Electrohydraulic Engine Mount Solenoid Valve - N144- / Right Electrohydraulic Engine Mount Solenoid Valve - N145-

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NOTE:

Ignore -1 and 2-.

-- Disconnect the connector -1- on the Oil Pressure Regulation Valve -N428- and free up the wire.

Fig 43: Oil Pressure Regulation Valve - N428-

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NOTE:

Ignore -2-.

-- Disconnect connector -2- from the Transmission Coolant Valve -N488-.

Fig 44: Transmission Coolant Valve -N488-

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NOTE:

Ignore -2 and arrows-.

Fig 45: Disconnecting Connector From Transmission

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CAUTION:

Risk of destroying the transmission control module (Mechatronic) with static discharge.

Do not touch connector terminals in the transmission connector with hands.

-- To discharge static electricity, touch the transmission housing (without wearing gloves).

-- Turn the twist lock counter-clockwise -arrow- and disconnect the connector from the transmission.

-- Free up the wiring harness on the transmission.

-- Disconnect the connector -2- from the Engine Speed Sensor -G28- and free up the wires on the transmission.

Fig 46: Engine Speed Sensor -G28-

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-- Free up the wiring harness on the transmission.

NOTE:

Ignore -1-.

Continuation for All Vehicles:

WARNING:

Refrigerant can cause serious injury.

Do not open the A/C system refrigerant circuit.

-- Remove the connector -1- from the bracket and disconnect it.

Fig 47: Connector For Wiring To Air Conditioning Compressor Clutch Solenoid & Compressor Mounting Bolts

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Vehicles from MY 2014:

-- Free up the wiring harness and place on the A/C compressor.

Continuation for All Vehicles:

CAUTION:

Risk of damaging the refrigerant lines and hoses.

Do not bend, twist or stretch the refrigerant lines and hoses.

-- Remove the bolts -arrows-. Then remove the A/C compressor from the bracket and tie it up on the left side.

Vehicles through MY 2013:

Fig 48: Removing Connector From Bracket

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-- Remove the connectors from bracket and disconnect:

For the Left Electrohydraulic Engine Mount Solenoid Valve -N144- / Right Electrohydraulic Engine Mount Solenoid Valve -N145- (only Solenoid Valve Version I)
For the Servotronic Solenoid Valve -N119-

Vehicles from MY 2014:

Fig 49: Identifying Electrohydraulic Engine Mount Solenoid Valve Connectors

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-- Disconnect the connector -2- and free up the wiring harness.

NOTE:

Ignore -1-.

-- Remove the bolt -1- and free up the ground cable on the left longitudinal member.

Fig 50: Identifying Ground Cable, Bolt Connector And Nut

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-- Remove the nut -3- and disconnect the connector -2-.

Continuation for All Vehicles:

Fig 51: Identifying Left And Right Connector

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-- Disconnect the connector -arrow- on the left and right from the Left Front Level Control System Sensor -G78- / Right Front Level Control System Sensor -G289- and free up the wire.

-- Disconnect the connectors -arrow- at the left and right on the front speed sensors.

Fig 52: Identifying Speed Sensor Connector

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-- Remove the brake caliper and secure it with the brake hose still attached inside the wheel housing with wire. Refer to FRONT BRAKE CALIPER .

Fig 53: Free Up Electrical Connector

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CAUTION:

Risk of damaging the brake pistons.

Do not operate the brake pedal when the brake caliper is removed.

-- Repeat the procedure on the other side of the vehicle.

-- Remove the nut -2- and the bolt -1-.

Fig 54: Disconnecting Upper Control Arm From Wheel Bearing Housing

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-- Remove the upper control arm upward from the wheel bearing housing -arrows-.

-- Repeat the procedure on the other side of the vehicle.

-- Remove the left and right stabilizer bar bolt -1-.

Fig 55: Identifying Left And Right Stabilizer Bar Bolt

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-- Remove the left and right nuts -3-.

NOTE:

The bolt -2- will be removed later.

-- Remove the subframe crossbrace. Refer to Subframe Crossbrace, Removing and Installing .

Fig 56: Locating Subframe Crossbrace

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CAUTION:

There is a risk of damaging the suspension components.

If the subframe mount, steering gear or subframe crossbrace are not installed correctly, do not rest the vehicle on its wheels.

-- Remove the steering intermediate shaft from the steering gear and push it upward. Refer to Steering Intermediate Shaft, Removing and Installing .

Fig 57: Locating Steering Column Universal Joint Bolt

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NOTE:

A vehicle through MY 2013 is illustrated.

-- Release the retainers in direction of -A arrows- and slide the sleeve -1- on the emergency release cable in the direction of -arrow B-.

Fig 58: Identifying Emergency Release Cable

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-- Disengage the rear section of the emergency release cable from the front section of the emergency release cable -arrow C-.

Vehicles with Engine Codes CMHA, CPNA and CPNB:

Fig 59: Reducing Agent Injector -N474-

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-- Disconnect the connector -2-.

-- Loosen the clamp -3- and remove the Reducing Agent Injector -N474-.

NOTE:

Ignore -1-.

Vehicles with Engine Codes CTBA, CTBB, CTBD:

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-- Remove the NOx Sensor Control Module 2 -J881- -arrow-.

FWD Vehicles:

Fig 60: Identifying Tunnel Brace Bolts

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-- Remove the tunnel brace -1-. Refer to UNDERBODY PANEL .

-- Loosen the threaded connections and slide the clamping sleeve -arrow- toward the rear.

Fig 61: Exhaust System Clamping Sleeve (Single Exhaust Pipe)

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CAUTION:

Risk of damaging the decoupling element inside the front exhaust pipe.

Do not bend the decoupling element in the front exhaust pipe more than 10°.

NOTE:

If the engine and transmission are to be separated for the subsequent work, separate the drive plate threaded connection at the flywheel/torque converter. Refer to Continuation for All Vehicles: .

Scissor Lift Table, Preparing:

Fig 62: Identifying Scissor Lift Platform VAS 6131

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-- Equip the :VAS6131B with the :VAS6131/10 and :VAS6131/11 and :VAS6131/13 as follows:

Table Coordinates	Components from the :VAS6131/10 , :VAS6131/11 and :VAS6131/13
B4	/13-4	/10-4	/10-5	/13-1
G4	/13-4	/10-4	/10-5	/13-1
B6	/10-1	/10-2	/10-5	/11-2
G6	/10-1	/10-2	/10-5	/11-2
A8+C8	/13-6			/13-2
F8+H8	/13-5			/13-2
B14	/10-1	/10-4	/10-5	/10-7
G14	/10-1	/10-4	/10-5	/11-1

-- Secure the mounting elements to the scissor lift table by hand.

-- Position the :VAS6131B horizontally.

Note the bubble level (sight glass) on support platform.

-- Guide the :VAS6131B under the engine/transmission assembly.

Fig 63: Identifying Subframe Bolts

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WARNING:

The subframe could cause an accident if it is not secured.

Do not loosen the subframe bolts -2 and 3- yet.

-- Remove the left and right subframe bolt -1-.

-- Attach the mounting elements from the :VAS6131/10 and :VAS6131/13 to the front of the subframe on the left and right as shown.

Fig 64: Attach At Left And Right Front Of Subframe

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-- Make sure the threaded spindles are completely screwed in.

-- Attach the mounting elements from the :VAS6131/10 and :VAS6131/11 to the front connecting points for the subframe crossbrace on the left and right sides at the rear as shown.

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-- Attach the mounting elements from the :VAS6131/13 to the bottom of the wheel bearing housing on the left and right sides as shown.

Fig 65: Attach At Lower Left And Right Of Wheel Bearing Housing

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-- Attach the mounting elements from the :VAS6131/10 and :VAS6131/11 to the tunnel crossmember on the left and right sides at the rear as shown.

Fig 66: Attaching Mounting Elements (4 Of 4)

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-- Rotate all of the mounting element spindles upward until all the mounting pins come in contact with the mounting points.

-- Fasten the mounting element base plates to 20 Nm on the :VAS6131B .

-- Mark the installation position of the subframe and tunnel crossmember to the longitudinal members using a felt-tip pen.

Fig 67: Identifying Subframe Bolts

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-- Remove the left and right subframe bolts -2 and 3- in stages.

-- Remove the tunnel crossmember bolts -arrows-.

Fig 68: Identifying Bolts

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-- Remove the left and right bolts -2-.

Fig 69: Identifying Left And Right Stabilizer Bar Bolt

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CAUTION:

Risk of damaging the hose and line connections as well as the engine compartment.

Make sure all the hose and line connections between the engine, transmission, subframe and body have been disconnected.
Carefully guide the engine/transmission assembly with the subframe out of engine compartment when lowering.

-- Lower the engine/transmission assembly with the : VAS6131B .

-- Remove the :VAS6131B with the engine/transmission assembly from under the vehicle.