SEAT Workshop Service and Repair Manuals

Supercharger air system tightness (engine codes BWJ, CDLA, CDLD) 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 t  Adapter -VAG 1687/5-, see equivalent → Anchor

–  Unscrew the securing bolts -arrows- and remove the engine soundproofing..

–  Release the safety fastener -A- and detach the hose -B- from the supercharger air pipe.

–  Attach the adaptor -VAG 1687/5- to the supercharger air hose -A- and turn it approx. 90° -B-. Prepare the cooling system leakage check -VAG 1687- as described below:

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

–  Connect the leakage tester -VAG 1687- as shown.

–  Connect the compressed air hose -1- (compressed air supply) to the cooling system leakage tester -VAG 1687-.   Note If there is water in the inspection hole, drain it through the drain screw -6-. –  Open valve -3-. –  Adjust pressure to 0.5 bar with pressure regulating valve -2-.   Caution The pressure must not exceed 0.5 bar. If the pressure is set too high this can damage the engine. –  Open valve -4- and wait until the test circuit is filled. If necessary readjust pressure to 0.5 bar. –  Check for leaks in the supercharger system by listening, feeling, using leak-detector spray or with the ultrasound measuring device -VAG 1842S-.   Note t  Assembly of hose connections with couplings → Chapter. t  A small amount of air escapes through the valves and enters the engine. A pressure retention test can therefore not be carried out. t  Operation of ultrasonic leakage tester -VAG 1842S- → Operating instructions. t  Before removing the adaptor, depressurize the inspection circuit by releasing the coupling of the adaptor -VAG 1687/5-. t  The couplings and air hoses of the supercharging system must be free from oil and grease before assembling.