GTI L4-2.0L Turbo (BPY) (2007)
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Remove pressure regulator valve -2- completely and close valves -3- and -4-.
NOTE: In order to be able to turn pressure regulator valve -2-, rotary knob must be pulled upward.
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Connect testing unit for turbocharger V.A.G 1687 as shown.
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Connect pressurized air hose -1- (pressurized air supply) to testing unit for turbocharger V.A.G 1687.
NOTE: If water is located in viewing glass, drain it via water drain screw -6-.
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Open valve -3-.
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Set pressure to 0.5 bar using pressure regulator valve -2-.
CAUTION: Pressure must not exceed 0.5 bar. A pressure set too high may damage the engine.
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Open valve -4- and wait until testing circuit has filled. If necessary, continue to regulate pressure to 0.5 bar.
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Check charge air system for leaking areas by listening, touch, using leak detection spray or using ultrasonic measuring device V.A.G 1842.
NOTE:
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Assembly of hose connections with connection couplings.
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A small quantity of air dissipates via valves in engine. A retaining pressure test is not possible for this reason.
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Handling instructions of ultrasonic measuring device V.A.G 1842 Owners Manual.
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Before removing adapter, discharge pressure in testing circuit by pulling off coupling from adapter V.A.G 1687/5.
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Hose connections and charge air system hoses must be free of oil and grease before installing.