Oil check valve and spray nozzle valve, removing and installing

WARNING: This page is about a different car, the 2008 Audi RS 4 and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If irregular valve noise occurs repeatedly during short journeys and disappears after extended driving, the oil check valve must be replaced.

Removing

Remove intake manifold → 24 - MULTIPORT FUEL INJECTION (MFI) .

Fig 1: Identifying Bolts On High Pressure Line Retaining Clamps, Fuel Injectors Electrical Harness Connectors & High Pressure Lines

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolts - 1, 4, 5, 6, 7 - on high pressure line retaining clamps.
Disconnect electrical harness connectors at fuel injectors.
Remove high pressure lines - 2 - and - 9 - from connections on fuel rail.
Remove high pressure lines - 3 - and - 8 - from connections on fuel rail. To do this, counter hold at hex head with and open-end wrench and loosen the union nut.

Remove high pressure lines.

Fig 2: Removing Bolts & Cover With Crankcase Ventilation Hose

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolts - arrows -.
Remove cover - 2 - with crankcase ventilation hose - 1 -.
Remove seal.

Fig 3: Removing Oil Check Valve And Spraying Nozzle Valve

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove oil check valve - 1 - and spray nozzle valve - 2 -.

Installing

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

NOTE:

Replace gaskets and O-rings.

Install high pressure lines → 24 - MULTIPORT FUEL INJECTION (MFI) as described under "Fuel injectors, removing and installing".
Install intake manifold → 24 - MULTIPORT FUEL INJECTION (MFI) .

Torque specifications

Component	Nm
Cover to cylinder block	9