Oil check valves and spray nozzle valve, 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.

NOTE:

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

Removing

Remove intake manifold → Intake manifold, removing and installing .
Remove oil filter housing → Oil filter housing, removing and installing .

Fig 1: Identifying Right Rear Knock Sensor Bolt, Crankshaft Housing Ventilation & Oil Check Valves Cover

GW00018276

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove bolt - 1 - and remove right rear knock sensor.
Remove hose of crankshaft housing ventilation - arrow -.
Unscrew cover - 2 - for oil check valves.
Remove seal.

Fig 2: Removing Oil Check Valves & Spray Nozzle Valve

GW00018277

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove oil check valves - 1 - and - 3 -.
Remove spray nozzle valve - 2 -.

Installing

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

NOTE:

Replace gaskets and O-rings.
Secure all hose connections using hose clamps appropriate for the model type .

Install oil filter housing → Oil filter housing, removing and installing .
Install intake manifold → Intake manifold, removing and installing .

Torque specifications

Component	Nm
Cover for oil check valves to cylinder block	10
Knock sensor to cylinder block	25 * See note

*Do not oil bolt.