SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 3-cylinder diesel engine with pump injector unit, mechanics | Exhaust turbocharger, G-charger | Checking the supercharger system for leaks

Checking the supercharger system for leaks

Special tools and workshop equipment required

t	Charge air system tester -V.A.G 1687-

t	adjustable adaptor -V.A.G 1687/10-

–	Remove intake hose -1- from air filter.

–	Attach the adjustable adaptor -1687/10- to the intake hose-1- and and fix it with a clamp.

Prepare the supercharger system tester -V.A.G 1687-, as described below:

–	Turn the pressure valve -2- anticlockwise until the end.

–	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 adjustable adaptor -1687/10-.

Note

It is not possible to carry out a pressure maintenance test.

–	Connect compressed air hose -1- (compressed air supply) to charge air system tester -V.A.G 1687-.

Note

If there is water in the inspection hole, drain it through the drain screw -6-.

–	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 set too high this can damage the engine.

–	Open valve -4- and wait until test circuit is full. If necessary reset the 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 -V.A.G 1842-.

Note

t	How to use the ultrasonic tester -V.A.G 1842- → Operating manual.

t	If a leak is found, consult the notes on the supercharge system for the fitting work to be done → Chapter.

t	Before removing the adaptor, depressurize the inspection circuit by releasing the coupling of the adjustable adaptor -1687/10-.

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