Right cylinder head cover, removing and installing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Audi S4, 2008 Audi S4, 2007 Audi S4, 2006 Audi S4, and 2005 Audi S4. 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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Remove rear engine cover - arrows -.

Fig 2: Identifying Evaporative Emission Canister Purge Regulator Valve N80 And Air Duct

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Disengage Evaporative Emission (EVAP) Canister Purge Regulator Valve N80 - 1 - from air guide.
Remove bolts - arrows -.
Remove air duct - 2 -.

CAUTION: Note rules of cleanliness for working on the fuel injection system → Rules for cleanliness .

CAUTION: Fuel system is under pressure! Before opening system, place clean rags around connection. Then release pressure by carefully loosening connection.

Fig 3: Installing/Removing Fuel Hose To/From Connection On Fuel Rail Line

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Remove fuel hose from connection on fuel rail line. To do so, counter hold using an open-end wrench at hex head - 1 - and - 3 - and remove union nut - 2 -.

Fig 4: Identifying Electrical Harness Connectors, Secondary Air Injection (AIR) Pump Hose, Air Guide Hose & Mass Air Flow (MAF) Sensor

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Disconnect electrical harness connector - 2 - from Evaporative Emission (EVAP) Canister Purge Regulator Valve N80.
Disconnect electrical harness connector - 3 - at Mass Air Flow (MAF) Sensor G70.
Disconnect hose - 1 - to Secondary Air Injection (AIR) pump.
Disconnect air guide hose - 4 - at Mass Air Flow (MAF) Sensor G70.

Move wiring harness clear at air filter housing.
Remove clip and remove air filter housing with Mass Air Flow (MAF) Sensor G70.

Fig 5: Disconnecting Vacuum Hose & Air Guide Hose From Throttle Valve Control Module

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Disconnect vacuum hose - 1 -.
Disconnect air guide hose - 2 - from Throttle Valve Control Module J338.

Fig 6: Removing Bolts On Right Cylinder Head, Disconnecting Electrical Harness Connectors & Removing Ignition Coils

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Remove bolts - 5 - and - 6 - on right cylinder head.
Disconnect electrical harness connectors - 1 to 4 -.
Remove ignition coils - arrows -.

NOTE:

Extractor T40039 can be used for removal.

Fig 7: Disconnecting Hose Of Crankshaft Housing Ventilation & Removing Right Cylinder Head Cover Screws In Sequence

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Disconnect hose of crankshaft housing ventilation - arrow -.
Remove right cylinder head cover bolts in sequence - 15 to 1 -.
Remove cylinder head cover.

Installing

Installation is in reverse order of removal, note the following:

NOTE:

Replace cylinder head cover gaskets if damaged.
Replace bolts for cylinder head cover if gasket is damaged.

Clean sealing surfaces, they must be free of oil and grease.

Fig 8: Coating Semicircular Seals Lightly With Oil And Insert

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Coat semicircular seals - arrows - lightly with oil and insert.

Fig 9: Disconnecting Hose Of Crankshaft Housing Ventilation & Removing Right Cylinder Head Cover Screws In Sequence

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Tighten cylinder head cover in sequence - 1 to 15 -.

Fig 10: Installing/Removing Fuel Hose To/From Connection On Fuel Rail Line

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Secure fuel hose to connection on fuel rail line. To do so, counter hold using an open-end wrench at each hex head - 1 - and - 3 - and tighten union nut - 2 - to 22 Nm.

Torque specifications

Component	Nm
Cylinder head cover to cylinder head	10
Wiring for ignition coils at cylinder head cover	5 * See note
Fuel supply line to fuel rail	22

* Insert using locking compound; locking compound .