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Home >> Volkswagen >> 2016 >> Tiguan R-Line, FWD >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> 2.0L - Turbocharger & Supercharger - Engine Code: CCTA >> 21 Turbocharger, Supercharger >> Diagnosis And Testing >> Charge Air System, Checking For Leaks

Charge Air System, Checking For Leaks

Special Tools And Workshop Equipment Required: 

-- Remove the noise insulation, refer to one of the following:

For GTI and Tiguan, refer to DESCRIPTION AND OPERATION .

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

Fig 1: Identifying Locking Clip & Charge Air Hose
GWWN21-10041Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Install the Turbo System Tester Kit - Adapter 5 VAG 1687/5 to charge air hose the direction of -arrow A- by lining up the marks -arrows- and rotate the Turbo System Tester Kit - Adapter 5 VAG 1687/5 approximately 90° (1/4) turn in the direction of -arrow B-.

Fig 2: Connecting Adapter VAG 1687/5 To Charge Air Hose And Rotate It Around Approx. 90 Degrees
GWWN21-10039Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Prepare the Turbo System Tester Kit VAG 1687 as follows: 

-- Pull upward -arrow- and then turn the pressure regulator valve -2- counterclockwise until it stops.

Fig 3: Preparing Turbo System Tester Kit VAG 1687
GWWV21-0168Courtesy of VOLKSWAGEN GROUP OF AMERICA, 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 -arrow-.

-- Connect the Turbo System Tester Kit VAG 1687 to the Turbo System Tester Kit - Adapter 5 VAG 1687/5 as shown.

Fig 4: Connecting Testing Unit For Turbo Charger VAG 1687
GWWN21-10040Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect a pressurized air hose -1- to the Turbo System Tester Kit VAG 1687.

Fig 5: Connecting Pressurized Air Hose To Testing Unit For Turbo Charger VAG 1687
GWWV21-0168Courtesy of VOLKSWAGEN GROUP OF AMERICA, 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 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 VAG 1842.

NOTE:

Charge air hose connecting, refer to CHARGE AIR HOSE, DISCONNECTING AND CONNECTING .

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

Handling instructions of Ultrasonic Measuring Device VAG 1842, refer to the operator's manual.

Before removing the Turbo System Tester Kit - Adapter 5 VAG 1687/5, discharge the pressure in the testing circuit by pulling off the coupling from the Turbo System Tester Kit - Adapter 5 VAG 1687/5.

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

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