Charge Air System, Checking For Leaks: Procedure

WARNING: This page is about a different car, the 2018 Audi Q3 Quattro, 2018 Audi Q3, 2017 Audi Q3 Quattro, and 2017 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.

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

-- Follow the guidelines for clean working conditions. Refer to GUIDELINES FOR CLEAN WORKING CONDITIONS .

Prepare the :VAG1687 as follows:

Courtesy of AUDI OF AMERICA, LLC

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

The knob must be pulled upward in order to turn the pressure regulating valve.

-- 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:

- Never set the test pressure specified.

-- 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. Refer to the Owner's Manual for information on using the :VAG1842S .

TIP:

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