Charge Air System, Checking For Leaks: Procedure

WARNING: This page is about a different car, the 2016 Audi Q3 Quattro, 2016 Audi Q3, 2015 Audi Q3 Quattro, and 2015 Audi Q3. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the noise insulation. Refer to Noise Insulation, Removing And Installing .

-- Raise the retaining clip -A- and remove the air guide hose -B-.

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-- Attach the : VAG1687/5 to the air guide hose -A- and turn 90° -arrow B- to lock in place.

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-- Connect the hose for the : VAG1687 to the : VAG1687/5 as shown in illustration.

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Prepare the : VAG1687 as follows:

-- Fully turn out the pressure regulator valve -2- to the closed position and close the valves -3 and 4-.

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The rotary knob must face upward so the pressure control valve -2- can be turned.

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

NOTE:

If there is water in he viewing glass, drain it through the drain plug -6-.

-- Open the valve -3-.

CAUTION:

Damage could result if the pressure is set too high.

Pressure must not exceed 0.5 bar (7.25 psi)!

-- Set the pressure to 0.5 bar (7.25 psi) using the pressure control valve -2-.

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure to 0.5 bar (7.25 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 valves in engine. A pressure retention test is not possible for this reason.

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

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