Charge Air System, Checking For Leaks: Notes

Special Tools And Workshop Equipment Required

Depending on the model, preliminary work may be required. Refer to CHARGE AIR SYSTEM .

Prepare the :VAG1687 as follows:

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

Fig 1: Connecting Pressurized Air Hose To Testing Unit For Turbo Charger V.A.G 1687

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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

-- Drain the water in the viewing glass via the water drain plug -6-.

-- Open the valve -3-.

CAUTION:

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

-- Set the pressure to 0.2 bar (2.9 psi) using the pressure regulating valve -2-.

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure to 0.2 bar (2.9 psi) again if necessary.

-- Listen, feel and use commercially available leak detection spray or the :VAG1842 to check the charge air system for leaks.

NOTE:

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

Information on the :VAG1842S . Refer to the Operating Instructions.

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

Secure all hose connections with hose clamps that match the ones used in series production. Refer to the Parts Information.