Oil check valves, assembly overview

WARNING: This page is about a different car, the 2006 Audi A8, 2005 Audi A8, and 2004 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Oil Check Valves, Assembly Overview

Courtesy of VOLKSWAGEN UNITED STATES, INC.

1 - O-ring

Replace

2 - Oil check valve, 20 Nm

For oil supply to left cylinder head

3 - Gasket

Replace

4 - Cover

With connection for crankshaft housing ventilation

5 - 10 Nm

6 - Connecting hose

7 - Crankcase ventilation pipe

Cylinder bank 1 (right)

8 - 10 Nm

9 - 10 Nm

10 - Crankcase ventilation pipe

Cylinder bank 2 (left)

11 - Connecting hose

12 - Oil check valve, 20 Nm

For oil supply to right cylinder head

13 - O-ring

Replace