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Turbo System Tester Kit - VAG1687- . Note If water is located in viewing glass, drain it via the water drain plug -6-. – Open the valve -3-. valve -2-. Caution The pressure must not exceed 0.5 bar (7.2 psi)! A pressure set too high may damage the engine. – Open the valve -4- and wait until the test circuit is filled. Adjust the pressure to 0.5 bar (7.2 psi) if necessary. – Check the charge air system for leaks by listening, feeling and using a commercially available leak detection spray or using the Ultrasonic Tester - VAG1842S- . Note ♦ Connector Coupling Between Charge Air Cooler and Con‐ necting Hose, Disassembling and Assembling. Refer to ⇒ “4.3 Connector Coupling Between Charge Air Cooler and Connecting Hose, Disassembling and Assembling”, ♦ Small leaks on the intake side of the turbocharger are permit‐ ted because the intake hoses are not designed for positive pressure. ♦ A small quantity of air dissipates via the valves in the engine. For this reason a pressure retention test is not possible. ♦ Information on the Ultrasonic Tester - VAG1842S- . Refer to the Operating Instructions. ♦ If a poorly sealed area is discovered, observe the notes for charge air system when repairing. Refer to ⇒ “4 Charge Air System”, page 289 ♦ Before removing the adapter, discharge the pressure in testing circuit by pulling off the coupling from the Turbo System Tester Kit - Adapter 10 - VAG1687/10- . 4.5 Vacuum Hose Connection Diagram Caution When routing the vacuum lines, make sure they are not kinked, twisted or pinched. They could disable the vehicle. 4. Charge Air System 295 |