SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4 cylinder Diesel engine (1.9l TDI) | Exhaust turbocharger, G-charger | Supercharger air system with turbocharger: check

Checking the supercharger system 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

–	Remove intake hose -1- from air filter.

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

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 cooling system leakage tester -VAG 1687- to the adjustable adaptor -1687/1-.

–	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 whether the supercharge system has leaks by listening, feeling or using leak detector spray.

Note

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 -1687/1-.

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