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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 1687/10)

Adapter (V.A.G 1687/11)

Adapter (V.A.G 1687/12)

Ultrasonic Tester (V.A.G 1842)

- Remove the noise insulation.

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






- Depending on the hose diameter, install the (V.A.G 1687/10) , (V.A.G 1687/11) or (V.A.G 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 - with a commercially available adapter piece.






If there is water in he 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 (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 (V.A.G 1842) see operating instructions.

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 of the same type as those equipped by the factory. Refer to the Parts Catalog.

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