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 Turbocharger V.A.G 1687
Adapter V.A.G 1687/5

-- Remove the noise insulation. Refer to Description and Operation .

-- 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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-- Connect the adapter V.A.G 1687/5 to the charge air pipe -A- and rotate it approximately 90° -B-.

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

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

-- Turn the pressure regulator valve -2- counterclockwise until it stops.

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

Courtesy of VOLKSWAGEN UNITED STATES, INC.

-- Close the valves -3 and 4-.

NOTE:

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

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

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 testing unit for turbocharger V.A.G 1687.

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

Courtesy of VOLKSWAGEN UNITED STATES, INC.

NOTE:

If water is located in the viewing glass, drain it via the 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 testing circuit has filled. If necessary, continue to regulate the pressure to 0.5 bar.

-- Check the charge air system for leaks by listening, feeling, using commercially available leak detection spray or by using the ultrasonic measuring device V.A.G 1842.

NOTE:

Charge air hose, installing. Refer to CHARGE AIR HOSE, INSTALLING .

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

For handling instructions of the ultrasonic measuring device V.A.G 1842, refer to the operators manual.

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

Hose connections and charge air system hoses must be free of oil and grease before installing.