Left 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.

-- 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 part 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 EVAP canister purge regulator valve 1 --.

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

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-- Remove -N80- -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 bolts -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.

-- Extract power steering fluid from the reservoir using the V.A.G 1782.

Fig 14: Identifying Hose For Power Steering Fluid Reservoir

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NOTE:

Place a rag under separating point to catch escaping hydraulic fluid.

-- Remove hose from power steering fluid reservoir -arrow-.

NOTE:

Place a rag under separating point to catch escaping hydraulic fluid.

Fig 15: Identifying Bolts And Nut For Power Steering Supply Line

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-- Remove bolts -1- and nut -2- and remove power steering supply pipe.

-- Remove bolt -1- and remove oil dipstick guide tube upward and out -arrow-.

Fig 16: Identifying Bolt And Oil Dipstick Guide Tube

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-- Remove coolant hose -arrows-.

Fig 17: Identifying Coolant Hose

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-- Disconnect electrical harness connector -arrow- at Camshaft Position (CMP) sensor 4 -G301-.

Fig 18: Identifying Electrical Harness Connector At Camshaft Position (CMP) Sensor 4 G301

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-- Remove the bolts -1 and 2-.

Fig 19: Identifying Bolts And Coolant Hoses

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-- Remove left coolant pipe from coolant hoses -arrows-.