Charge Air System, Checking For Leaks

Special tools and workshop equipment required

Procedure

-- Remove the resonator for the intake air scoop. Refer to INTAKE AIR SCOOP RESONATOR, REMOVING AND INSTALLING .

-- Connect the : VAG1687/15 with the : VAG1687/11 to the turbocharger.

Fig 1: Identifying Turbo System Tester Kit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the hose -1- from the : VAG1687 to the adapter.

Prepare the : VAG1687 as follows:

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Completely remove the pressure regulating valve -2- and close the valves -3 and 4-.

The knob must be pulled upward so that the pressure regulating valve -2- can be turned.

-- Connect the : 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-.

-- Open the valve -3-.

There is a Risk of Damaging the Engine.

There is a risk of damage if the pressure is set too high.

The pressure must not exceed 0.5 bar (7.2 psi)!

-- Set the pressure to 0.5 bar (7.2 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 (7.2 psi) again if necessary.

-- Check the charge air system for leaks by listening, feeling and using commercially available leak detection spray or 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 Owner's Manual for information on using the : VAG1842S .

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

Assemble in the reverse order of removal. Note the following:

-- Replace the seal and O-rings.

Tightening Specifications