Charge Air System, Checking For Leaks

Special tools and workshop equipment required

Procedure

Fig 1: 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 2: 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:

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 -6-, drain it through the drain plug.

The test pressure must not exceed 0.2 bar. Risk of engine damage.

-- Open the valve -3-.

-- Set the pressure to 0.2 bar using the pressure regulating valve -2-.

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure back to 0.2 bar, if necessary.

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