Rear Coolant Pipe: Removing

WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

All cable ties opened or cut during engine removal must be reinstalled at the same locations during installation.

-- Drain the coolant. Refer to COOLING SYSTEM, DRAINING AND FILLING .

-- Pull rear engine cover off -arrows-.

Fig 1: Pulling Rear Engine Cover

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-- Pull front engine cover off -arrows-.

Fig 2: Identifying Front Engine Cover, Electrical Connector, And Left Air Guide Hose

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-- Disconnect electrical connector -2- at Mass Airflow (MAF) sensor 2 -G246-.

Fig 3: Locating Electrical Connector, Air Guide Hose, And Retaining Clips

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-- Remove left air guide hose -1- from air duct.

-- Release retaining clips -3- and remove upper left section of air filter housing.

-- Disconnect hose -1- to Secondary Air Injection (AIR) pump.

Fig 4: Identifying Hose To Secondary Air Injection Pump, Electrical Harness Connector, Right Air Guide Hose, And Retaining Clips

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-- Disconnect electrical harness connector -4- at MAF sensor -G70-.

-- Remove right air guide hose -3- from air duct.

-- Release retaining clips -2- and remove upper right section of air filter housing from lower section.

Vehicles with air suspension:

NOTE:

If necessary, remove electrical connector for Heated Oxygen Sensor (HO2S) 2 -G108- from bracket at right strut tower for better access.

-- Press circlip -1- forward from hose coupling.

Fig 5: Circlip, Release Ring And Ventilation Hose

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-- Press release ring -2- down -arrows- and remove vent hose -3- from upper section of air filter.

All Vehicles

-- Disconnect vacuum hose -2- to Evaporative Emission (EVAP) canister purge regulator valve 1 -N80- by pressing release button.

Fig 6: Identifying Vacuum Hose To Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

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-- Free up vacuum hose.

NOTE:

Ignore -1 and 3-.

-- Disconnect electrical harness connector -2- from -N80-.

Fig 7: Identifying Electrical Harness Connector And Evaporative Emission (EVAP) Canister Purge Regulator Valve N80

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-- Remove EVAP canister purge regulator valve 1 -- -1- from bracket and lay aside.

NOTE:

Ignore -3-.

-- Disconnect the vacuum hose -4-.

Fig 8: Identifying Vacuum Hoses, Hose Clamp, Bolts, And Crankcase Ventilation Hose

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CAUTION:

Risk of violating emissions legislation.

Do not open hose connection -2- !

-- Lay the air guide hose aside with the vacuum hose connected.

-- Loosen hose clamp -1- and remove bolts -3-.

-- Remove air guide pipe to right.

-- Remove crankcase ventilation hose -2-.

Fig 9: Identifying Hose Clamp, Bolts, And Crankcase Ventilation Hose

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-- Remove bolts -3 to 5- and remove crankcase ventilation pressure regulator valve.

-- Remove oil runoff hose -1-.

NOTE:

To improve clarity, the removed engine is shown from the rear.

-- Remove crankcase ventilation hoses -1 and 3- together with coolant line -2-.

Fig 10: Identifying Crankcase Ventilation Hoses And Coolant Line

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NOTE:

To improve clarity, the removed engine is shown from the rear.

-- Remove vacuum hose -arrow- from intake manifold.

Fig 11: Identifying Vacuum Hose

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-- Disconnect electrical connection -1- at throttle valve control module -J338-.

Fig 12: Identifying Electrical Connection And Bolts

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-- Remove screws -arrows- and remove throttle valve control module --.

NOTE:

To improve clarity, the removed engine is shown from the rear.

-- Remove electrical connectors - 1 and 4- from brackets and disconnect them.

Fig 13: Identifying Electrical Connectors And Nuts

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-- Remove nuts -2 and 3-.

-- Remove engine wiring harness bracket from coolant pipe and set it to the rear.

NOTE:

To improve clarity, the removed engine is shown from the rear.

-- Remove nut -1- and bolt -2- on rear right coolant pipe.

Fig 14: Identifying Nut And Bolt On Rear Right Coolant Pipe

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NOTE:

Rear right coolant pipe remains in installation location.

-- Disconnect electrical connector -arrow- at Engine Coolant Temperature (ECT) sensor -G62-.

Fig 15: Component Location Of Engine Coolant Temperature (ECT) Sensor G62

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-- Remove coolant hose -3- to heater core from rear coolant pipe.

Fig 16: Identifying Bolts For Rear Coolant Pipe

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-- Remove coolant hose -4- to intake manifold from rear coolant pipe.

-- Loosen hose clamps -1 and 6- with VAS 5024 A and slide coolant connection hoses to side.

-- Remove bolts -2 and 5- and remove rear coolant pipe.