Charge Air System, Checking For Leaks

Special tools and workshop equipment required

Turbo System Tester Kit :VAG1687

Fig 1: Identifying Turbo System Tester Kit
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Procedure

Fig 2: Identifying Clamps With Air Guide Pipe

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Loosen the hose clamps -1 and 2- and remove the air duct pipe.

-- Connect the Turbo System Tester Kit - Adapter 10 :VAG1687/10 to the turbocharger using the Turbo System Tester Kit - Adapter :VAG1687/14 .

Fig 3: Identifying Turbocharger Testing Unit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the Turbo System Tester Kit :VAG1687 to the adapter.

Prepare the Turbo System Tester Kit :VAG1687 as follows:

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Pull the pressure regulating valve -2- upward and remove completely, close the valves -3 and 4-.

-- Connect the Turbo System Tester Kit :VAG1687 to compressed air -1- with a commercially available intermediate piece.

NOTE:

If there is water in the viewing glass, it must be drained through the drain plug -6-.

Pressure must not exceed 0.5 bar (7.25 psi)!

-- Open the valve -3-.

-- Set the pressure to 0.5 bar (7.25 psi) using the pressure regulating valve -2-.

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure to 0.5 bar (7.25 psi) again if necessary.

-- Check the charge air system for leaks by listening, feeling and using commercially available leak detection spray or the Ultrasonic Tester :VAG1842S .

NOTE:

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

Refer to the => Operating Instructions for information on using the Ultrasonic Tester :VAG1842S .

Release the pressure in the test circuit by pulling off the hose coupling before removing the adapter.

Assembling

Assembly is performed in reverse order.