Charge Air System, Checking For Leaks

Charge Air System, Checking for Leaks

Special tools, testers and auxiliary items required

• Testing Unit for Turbo Charger (V.A.G 1687)

• Adapter (V.A.G 1687/5)

- Remove the noise insulation.

- Remove the frame for the noise insulation.

- Release the securing clip - A - and disconnect the hose - B - from the charge air pipe.






- Mount the (V.A.G 1687/5) onto the charge air pipe - A - and turn it approx. 90° - B -.






Prepare the (V.A.G 1687) as follows:






- Remove the pressure regulator valve - 2 - and close valves - 3 and 4 -.

• In order to be able to turn pressure regulator valve - 2 -, rotary knob must be pulled upward.

- Connect the (V.A.G 1687) as illustrated.






- Connect the pressurized air hose - 1 - (pressurized air supply) to the (V.A.G 1687).






• If water is located in viewing glass, drain it via water drain plug - 6 -.

- Open the valve - 3 -.

- Set the pressure to 0.5 bar using the pressure regulator valve - 2 -.

Pressure must not exceed 0.5 bar! 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 if necessary.

- Inspect the charge air system for poorly sealed areas by listening, feeling, using commercially available leak detection spray or by using the ultrasonic measuring device (V.A.G 1842).

• Assembly of hose connections with connection couplings. Refer to => [ Air Guide Pipes and Hoses with Connector Coupling ] Service and Repair.

• A small quantity of air dissipates via valves in engine. A pressure retention test is not possible for this reason.

• Handling instructions of (V.A.G 1842) see the Owner's Manual.

• Before removing adapter, discharge pressure in testing circuit by pulling off coupling from (V.A.G 1687/5).

• Hose connections and charge air system hoses must be free of oil and grease before installing.