Charge Air System, Checking For Leaks

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Testing Unit for Turbo Charger V.A.G 1687
Adapter V.A.G 1687/5

-- Remove the noise insulation. Refer to Removal and Installation .

-- Remove the frame for the noise insulation. Refer to Removal and Installation .

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

Fig 1: Identifying Locking Clip & Charge Air Hose

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

Fig 2: Connecting Adapter V.A.G 1687/5 To Charge Air Hose And Rotate It Around Approx. 90 Degrees

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Prepare the V.A.G 1687 as follows:

Fig 3: Connecting Pressurized Air Hose To Testing Unit For Turbo Charger V.A.G 1687

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

NOTE:

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.

Fig 4: Connecting Testing Unit For Turbo Charger V.A.G 1687

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

Fig 5: Connecting Pressurized Air Hose To Testing Unit For Turbo Charger V.A.G 1687

Courtesy of AUDI OF AMERICA, LLC

NOTE:

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-.

CAUTION:

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.

NOTE:

Assembly of hose connections with connection couplings. Refer to AIR GUIDE PIPES AND HOSES WITH CONNECTOR COUPLING .

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.