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)

Procedure

- Remove the front noise insulation - 1 -.






- Raise the retaining clip - A - and remove the air guide hose - B -.






- Place the (V.A.G 1687/5) on the air guide hose - A - and rotate approximately 90° - B -.






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

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






• The rotary knob must face upward so the pressure control valve - 2 - can be turned.

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






- Connect the (V.A.G 1687) to compressed air - 1 - with a commercially available adapter piece.






• If there is water in the viewing glass, drain it through the drain plug - 6 -.

- Open the valve - 3 -.

Damage could result if the pressure is set too high.

• Pressure must not exceed 0.5 bar!

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

- Open the valve - 4 - and wait until the test circuit is filled. Regulate the presure to 0.5 bar again if necessary.

- Listen, feel and use commercially available leak detection spray or the ultrasonic tester (V.A.G 1842) to check the charge air system for leaks.

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

• For information on using the (V.A.G 1842) the Operating Instructions.

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

• The hose supports, air guide pipes and hoses must be free of oil and grease before installing.

- Follow the instructions for installing the air guide pipes and hoses with connector couplings. Refer to => [ Air Guide Pipes and Hoses with Connector Coupling ] Service and Repair.

- Install the noise insulation.