Charge Air System, Checking For Leaks: Procedure

WARNING: This page is about a different car, the 2015 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Free up the vacuum hoses -arrows-.

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-- Loosen the hose clamps -1 and 2- and remove the air duct pipe.

-- Connect the :VAG1687/11 with the :VAG1687/15 to the turbocharger.

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-- Connect the :VAG1687 to the adapter.

Prepare the :VAG1687 as follows:

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

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

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

NOTE:

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

-- Open the valve -3-.

CAUTION:

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

The pressure must not exceed 0.5 bar (7.2 psi)!

-- Set the pressure to 0.5 bar (7.2 psi) using the pressure regulating valve -2-.

-- Open the valve -4- and wait until the test circuit is filled. Regulate the pressure to 0.5 bar (7.2 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 and the EGR cooler. For this reason a pressure retention test is not possible.

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

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