Pressure relief valve in cap, checking
WARNING: This page is about a different car, the 2010 Audi A8, 2009 Audi A8, 2008 Audi A8, and 2007 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of VOLKSWAGEN UNITED STATES, INC.
|
- Attach cooling system tester V.A.G 1274 with adapter V.A.G 1274/9 on sealing cap.
- Generate a positive pressure using hand pump of cooling system tester.
- Pressure release valve must open at a positive pressure of 1.4 to 1.6 bar.
If check-valve does not open as indicated: