Charge Air System, Checking For Leaks

Special tools and workshop equipment required

-- Remove intake hose -1- from air filter.

Fig 1: Identifying Turbocharger Testing Unit V.A.G 1687 Connected To Accessory Adapter V.A.G 1687/1

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Place adapter V.A.G 1687/1 in intake hose -1- and secure it with a clamp.

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

-- Unscrew pressure regulator valve -2- completely and close valves -3- and -4-.

Fig 2: Identifying Pressurized Air Hose Connected To Testing Unit For Turbo Charger V.A.G 1687

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

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

-- Connect the testing unit for turbocharger V.A.G 1687 on adapter V.A.G 1687/1 as shown.

Fig 3: Identifying Turbocharger Testing Unit V.A.G 1687 Connected To Accessory Adapter V.A.G 1687/1

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect pressurized air hose -1- (pressurized air supply) to testing unit for turbocharger V.A.G 1687.

Fig 4: Identifying Pressurized Air Hose Connected To Testing Unit For Turbo Charger V.A.G 1687

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

If water is located in viewing glass, drain it via water drain plug -6-.

-- Open valve -3-.

-- Set pressure to 0.5 bar using pressure regulator valve -2-.

CAUTION:

Pressure must not exceed 0.5 bar! A pressure set too high may damage the engine.

-- Open valve -4- and wait until testing circuit has filled. If necessary, continue to regulate pressure to 0.5 bar.

-- Check charge air system for leaking areas by listening, touch, using leak detection spray or using ultrasonic measuring device V.A.G 1842.

NOTE:

Using the ultrasonic measuring device V.A.G 1842. See relevant operating instructions.

If a poorly sealed area is discovered, observe the notes for charge air system when repairing TURBOCHARGER ASSEMBLY OVERVIEW .

Before removing the adapter, release pressure from the test circuit by separating the connection from the accessory adapter V.A.G 1687/1.