SEAT Workshop Service and Repair Manuals > Leon Mk2 > Power unit | 4-cylinder diesel engine (1.9 l engine) | Exhaust turbocharger, G-charger | Charge air system with turbocharger

Checking charge air system for leaks

Special tools and workshop equipment required

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

t	Adapter -V.A.G 1687/10-

–	Remove intake hose -1- from air filter.

–	Connect adapter -1687/10- in intake hose -1- and secure with clip.

Prepare charge air system tester -V.A.G 1687- as follows:

–	Turn pressure regulating valve -2- anti-clockwise onto stop.

–	Close valves -3- and -4-.

Note

To turn the pressure regulating valve -2- the knob must be pulled upwards.

–	Connect charge air system tester -V.A.G 1687- to adapter -1687/10- as shown.

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

Note

If there is water in the sight glass, drain at water 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 too high this can cause damage to the engine.

–	Open valve -4- and wait until the test circuit is filled. If necessary readjust pressure to 0.5 bar.

–	Check the charge air system for leaks by hearing, touching, with commercially available leak detector spray or using ultrasonic tester -V.A.G 1842-.

Note

t	How to use the ultrasonic tester -V.A.G 1842- → operating instructions

t	If leaks occur, when doing any repair work observe notes for charge air system → Chapter.

t	Before removing the adapter, depressurise the test circuit by pulling coupling off adapter -1687/10-.

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