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)

- Remove noise insulation.

- Loosen the hose clamp - arrow -, pull of the air guide hose and move it to the side.






- Depending on the hose diameter, install the adapter (1687/10) , (1687/11) or (1687/12) into the air guide hose - 1 - and secure it with a hose clamp.






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

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






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

• Pull the knob in order to rotate the pressure regulating valve - 2 -.

- Connect the (V.A.G 1687) to compressed air - 1 -.






• 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 pressure 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.

• Refer to the operating instructions that came with the (V.A.G 1842).

• Release the pressure in the test circuit by pulling off the coupling before removing the adapter.

• The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing.

• Secure all hose connections with hose clamps appropriate for the model. Refer to the electronic parts catalog ETKA.

• To mount the air guide hoses on their connectors securely, spray the bolts on the used clamps with rust remover before installing.