Charge Air System, Checking For Leaks: Procedure

WARNING: This page is about a different car, the 2016 Volkswagen Beetle, 2015 Volkswagen Beetle, and 2014 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Clamps With Air Guide Pipe

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-- Loosen the clamps -1 and 2- and remove the air guide pipe.

-- Connect the Turbo System Tester Kit - Adapter 10 VAG 1687/10 with the Turbo System Tester Kit - Adapter 14 VAG 1687/14 to the turbocharger.

Fig 2: Identifying Turbocharger Testing Unit

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-- Connect the Turbo System Tester Kit VAG 1687 to the adapter.

Prepare the Turbo System Tester Kit VAG 1687 as follows:

Fig 3: Connecting Pressurized Air Hose To Testing Unit For Turbo Charger V.A.G 1687

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

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

-- Connect the Turbo System Tester Kit VAG 1687 to compressed air -1- with a commercially available adapter piece.

NOTE: If there is water in the 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 (7.2 psi)!

-- Set the pressure to 0.5 bar (7.2 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 (7.2 psi) again if necessary.

-- Listen, feel and use commercially available leak detection spray or the Ultrasonic Measuring Device VAG 1842 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.

Information on the Ultrasonic Measuring Device VAG 1842, refer to the Operator Manual.

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