SEAT Workshop Service and Repair Manuals

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

t  Charge pressure system tester -V.A.G 1687-, see equivalent → Anchor t  Adapter -VAG 1687/10-, see equivalent → Anchor t  Adapter -V.A.G 1687/12-, see equivalent → Anchor

Operation process –  Remove the engine cover upwards -arrows-.

–  Remove hose -1- of the cylinder block ventilation from the roller-type cam follower cap. To do so, press the tabs. –  Free vacuum hoses -arrows- at air pipe. –  Release hose clip -3- and remove air pipe from air filter housing. –  Unscrew bolt -2-, swing air pipe with inlet connection to rear and pull from turbocharger.

–  Unscrew bolts -arrows-. –  Release the hose clip -1- and remove the impulse absorber -2-.

–  Insert adapter -1687/10- in intake hose -1- and secure with clip. –  Insert adapter -1687/12- in intake hose -1- and secure with clip. Prepare the supercharger system tester -V.A.G 1687-, as described below:

–  Completely unscrew the pressure regulation valve -2- and close the valves -3- and -4-.   Note In order to unscrew the pressure regulation valve -2-, the rotary button must be completely upwards.

–  Attach the supercharge system checker -V.A.G 1687- to the adaptor -1687/12-.

–  Connect compressed air hose -1- (compressed air supply) to charge air system tester -V.A.G 1687-.   Note If there is water in sight glass, remove drain plug -6- and drain water. –  Open valve -3-. –  Set the pressure to 0.5 bar using the pressure regulation valve -2-.   Caution The pressure must not exceed 0.5 bar. If the pressure is too high this can cause damage to the engine. –  Open valve -4- and wait until the test circuit is filled. If necessary reset the pressure to 0.5 bar. –  Check charge air system for leaks by: t  Listening t  With your finger t  using standard leak detecting spray t  Ultrasonic tester -VAG 1842S-, see equivalent → Anchor   Note t  Slight leaks on the intake side of turbocharger are permissible, as the intake hoses are not designed for high-pressure. 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 leakage tester -VAG 1842S- → Operating instructions. t  If a leak is found, consult the notes on the supercharge system for the fitting work to be done. t  Depressurise test circuit by detaching coupling from adapter -1687/10- before removing adapter. Reassembly Installation is carried out in reverse order, noting the following:   Note t  Renew seal and O-rings. t  Hose connections and air pipes and hoses must be free of oil and grease before assembly. t  Secure all hose connections with the hose clips corresponding to original equipment → Electronic parts catalogue. –  Installing the intake pipe and impulse absorber → Chapter. –  Mount air intake hoses with screw clamps → Chapter.