Audi AMB Service Manual page 214

ENGINE 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AMB
Open cap on coolant expansion tank.

Fig. 286: Installing Tester VAG1274 With Adapter VAG1274/8 Onto Expansion Tank
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Install tester VAG1274 with adapter VAG1274/8 onto expansion tank.

Use tester hand pump to generate pressure of approx. 1.0 bar.

If there is a drop in pressure, locate leak and eliminate fault.

Checking pressure relief valve in cap
Fig. 287: Checking Pressure Relief Valve In Filler Cap
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Install tester VAG1274 with adapter VAG1274/9 onto cap.

Operate hand pump.

2005 Audi A4 Quattro
1:01:15 AM Page 202