SEAT Workshop Service and Repair Manuals

Supercharger air system: Checking for leaks Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter. Special tools and workshop equipment required

t  Cooling system leakage check -VAG 1687-, see equivalent → Anchor

–  Release quick-fasteners -1- and -2- and take off front noise insulation.

–  Open hose clip -arrow-, detach air hose and swivel to side.

–  Install adapter -1687/10- , -1687/11- or -1687/12- on vent hose -1- depending on hose diameter and fasten with hose clamp. –  Connect charge air system tester -V.A.G 1687- as shown on illustration.

Prepare charge air system tester -V.A.G 1687- as follows: –  Unscrew pressure control valve -2- completely and close valves -3- and -4-.   Note Make sure knob is pulled out before turning pressure control valve -2-.

–  Using a commercially available connection piece, connect charge air system tester -V.A.G 1687- to compressed air -1-.   Note If there is water in sight glass, remove drain plug -6- and drain water. –  Open valve -3-.   Caution Risk of damage if pressure is set too high. The pressure must not exceed 0.5 bar. –  Adjust pressure to 0.5 bar via pressure control valve -2-. –  Open valve -4- and wait until test system is pressurised. If necessary, adjust pressure to 0.5 bar again. –  Check charge air system for audible leaks or leaks that can be felt with the hand; apply commercially available leak detecting spray or use ultrasonic tester -V.A.G 1842-.   Note t  A small amount of air escapes through the valves and enters the engine. Therefore it is not possible to perform a pressure retention test. t  Operation of ultrasonic tester -V.A.G 1842- → Operating instructions. t  Release pressure in test circuit by detaching coupling from adapter before removing adapter. t  Hose connections and air pipes and hoses must be free from oil and grease before fitting. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. t  To secure the air hoses properly at their connections, spray rust remover onto the worm thread of the used hose clips before installing.