Charge Air System, Checking For Leaks: Procedure

Depending on the model, preliminary work may be required. Refer to Charge Air System, Checking for Leaks Charge Air Pressure SensorG31, Removing and Installing Charge Air Cooler, Removing and Installing Charge Air System 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 AUDI OF AMERICA, LLC

• Pull the knob in order to rotate the pressure regulating valve -2-.

-- 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-.

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

• Pressure must not exceed 0.2 bar (2.9 psi)!

-- 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. Refer to the Owner's Manual for handling.

TIP:

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

• 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 Catalog.