SEAT Workshop Service and Repair Manuals

Testing vacuum system Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter. Special tools and workshop equipment required

t  Manual vacuum pump -VAS 6213-, see equivalent → Anchor   Caution Do not kink, twist or crush the vacuum lines when routing. This may cause breakdowns.

–  Remove the engine cover upwards -arrows-. Check the supply line, the vacuum vessel and the non-return valve: –  Remove the switching valve for the radiator and the exhaust gas recirculation system -N345- from their mounts on the front side of the intake pipe.

–  Remove the vacuum hose from the bottom connection -arrow in I- on the exhaust gas recirculation radiator switching valve -N345- and from the charge pressure control solenoid valve -N75--arrow in II-. –  Seal the open side of the hose line with a suitable blind plug.   Note Do not use screws or threaded bolts. –  Pull vacuum hose -arrow- off connection piece of vacuum pump.

–  Connect hand vacuum pump -VAS 6213- to disconnected hose and generate a vacuum of 0.6 bar. –  Observe the pressure gauge of the manual vacuum pump for 30 seconds. The vacuum must not drop. If vacuum drops: –  Determine the damaged area or the leak in the hose and replace the respective hose section. If pressure does not drop: –  First pull hose off hand vacuum pump -VAS 6213-. –  Remove one of the blind plugs from the hose line. –  When the non-return valve is functional, an accompanying whistling noises that can be heard when the underpressure is reduced in the vacuum vessel. –  When no whistling noises can be heard, the non-return valve must be replaced. –  Reconnect all vacuum hoses again. Check the control line to the exhaust gas turbo charger.

–  Remove the hose from the middle connection on the exhaust gas recirculation radiator switching valve -N75--arrow in I- and from the turbocharger pressure capsule-arrow in II-. –  Seal the opening of the hose line with a suitable blind plug.   Note Do not use screws or threaded bolts. –  Connect hand vacuum pump -VAS 6213- to other hose end and generate a vacuum of 0.6 bar. –  Observe the pressure gauge of the manual vacuum pump for 30 seconds. The vacuum must not drop. If vacuum drops: –  Renew vacuum hose. Check the control line of the underpressure capsule of the radiator of the exhaust gas recirculation:

–  Remove the hose from the middle connection on the exhaust gas recirculation cooler change-over valve -N345--arrow-. –  Connect hand vacuum pump -VAS 6213- to disconnected hose and generate a vacuum of 0.6 bar. –  Observe the pressure gauge of the manual vacuum pump for 30 seconds. The vacuum must not drop. If pressure drops: –  Remove the hose of the underpressure capsule of the radiator of the exhaust gas recirculation. –  Connect hand vacuum pump -VAS 6213- to vacuum unit with test hose supplied and generate a vacuum of 0.6 bar.   Note t  The vacuum unit control range must be perceptible and the vacuum must not drop. If this was not the case, the exhaust gas recirculation cooler system must be replaced → Chapter. t  If no fault can be detected on the vacuum unit, renew the vacuum line from the exhaust gas recirculation cooler changeover valve -N345-.