Charge Air System, Checking For Leaks

Charge Air System, Checking For Leaks

Special tools, testers and auxiliary items required
- Turbocharger testing unit V.A.G 1687
- Adapter V.A.G 1687/5

- Remove noise insulation.







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







- Connect adapter V.A.G 1687/5 to charge air hose - A - and rotate it around approximately 90 degrees - B -.

Prepare testing unit for turbocharger V.A.G 1687 as follows:







- Turn the pressure regulating valve - 2 - counterclockwise until it stops.
- Close the valves - 3 - and - 4 -.

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







- Connect testing unit for turbocharger V.A.G 1687 as shown.







- Connect pressurized air hose - 1 - (pressurized air supply) to testing unit for turbocharger V.A.G 1687.

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

- Open valve - 3 -.
- Set pressure to 0.5 bar using pressure regulator valve - 2 -.

CAUTION: Pressure must not exceed 0.5 bar.A pressure set too high may damage the engine.

- Open valve - 4 - and wait until testing circuit has filled. If necessary, continue to regulate pressure to 0.5 bar.
- Check charge air system for leaking areas by listening, touch, using leak detection spray or using ultrasonic measuring device V.A.G 1842.

NOTE:
- Assembly of hose connections with connection couplings.
- A small quantity of air dissipates via valves in engine. A pressure retention test is not possible for this reason.
- Handling instructions of ultrasonic measuring device V.A.G 1842 See Owners Manual.
- Before removing adapter, discharge pressure in testing circuit by pulling off coupling from adapter V.A.G 1687/5.
- Hose connections and charge air system hoses must be free of oil and grease before installing.