A6 Quattro Sedan V8-4.2L (BVJ) (2007)
Engine Oil Check Valve: Service and Repair
Oil Check Valve and Spray Nozzle Valve, Removing and Installing
Oil check valve and spray nozzle valve, removing and installing
Note:
^
If irregular valve noises disappear after a long drive but always return on short drives, oil check valve must be replaced.
Removing
-
Remove intake manifold.
-
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
union nut.
-
Remove high pressure lines.
-
Remove bolts - arrows -.
-
Remove cover - 2 - with crankcase ventilation hose - 1 -.
-
Remove seal.
-
Remove oil check valve - 1 - and spray nozzle valve - 2 -.
Installing
^
Tightening torques see Oil check valve and spray nozzle valve, assembly overview.