Cooling system, checking for leaks

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2004 Audi A6, 2003 Audi S6, 2003 Audi A6, 2002 Audi S6, and 2002 Audi A6. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Engine must be at operating temperature.

Fig 1: Installing Tester VW 1274 With Adapter VW 1274/1 On Expansion Tank

Courtesy of AUDI OF AMERICA, INC.

Install tester VW 1274 with adapter VW 1274/1 on expansion tank.
Build up pressure of approx. 1.0 bar with hand pump on tester. If pressure does not hold, locate and repair leaks.