Left combination valve for secondary air injection, removing and installing

WARNING: This page is about a different car, the 2006 Audi A4, 2005 Audi A4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Removing

Fig 1: Removing Rear Engine Cover

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove rear engine cover (arrows).

Fig 2: Identifying Holding Plate, Intake Air Hose, Hose & Air Duct

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolts for holding plate -3- for solenoid valves (arrows).
Disconnect intake air hose -1- at Mass Air Flow (MAF) sensor.
Disconnect hose -4- for crankcase ventilation from air guide -2-.

Fig 3: Removing Bolt And Disconnect Air Duct At Throttle Valve Control Module

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt (arrow) and disconnect air guide -2- at throttle valve control module.
Disconnect hose -1- from air guide.

NOTE: The illustration shows the air guide from the rear with the engine removed.

Fig 4: Removing Cover In Engine Compartment (Left Side)

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove cover -1- in engine compartment (left side).

Fig 5: Removing Coolant Hoses

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Clamp coolant hose -2- using 3094 hose clamps and disconnect coolant hose from coolant reservoir.
Unbolt coolant reservoir (arrow).
Disconnect electrical wiring to Engine Coolant Level (ECL) warning switch -F66- at bottom of coolant reservoir.
Lay coolant reservoir with connected coolant hoses -1- and -3- to side.

Fig 6: Disconnecting Electrical Harness Connectors And At Camshaft Position (CMP) Sensor 2 -G163- And Camshaft Position (CMP) Sensor 4 -G301-

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Disconnect electrical harness connectors -1- and -2- at Camshaft Position (CMP) sensor 2 -G163- and Camshaft Position (CMP) sensor 4 -G301-.
Disconnect hose -3- from crankcase ventilation at cylinder head cover.

Fig 7: Identifying Bolts At Flange Of Combination Valve For Secondary Air Injection, Nut, Combination Valve & Vacuum Hose

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Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolts -1- at flange of combination valve for secondary air injection.
Loosen nut -3- several turns.
Remove bolts -2- and and disconnect vacuum hose (arrow).
Remove combination valve.

NOTE: Illustration is shown with engine removed.

Installing

Installation is reverse of removal, noting the following:

NOTE: Replace gaskets and O-rings.

Top up coolant. Refer to Filling .

Tightening torques

Component		Nm
Combination valve to cylinder head		10
Connector tube to	Combination valve	10
	Coolant line	10