Charge Air System, Checking For Leaks

WARNING: This page is about a different car, the 2017 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Procedure

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

Prepare the Turbo System Tester Kit: VAG1687 as follows:

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

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

-- Connect the Turbo System Tester Kit: 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 regulating 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 Ultrasonic Tester: VAG1842S 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 Information.

Assembling

Assembly is performed in reverse order.

Additional procedures depending on the model: CHARGE AIR SYSTEM, CHECKING FOR LEAKS .

Tightening Specifications

Refer to OVERVIEW - CHARGE AIR HOSE CONNECTIONS .