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| Connect pressure hose -1- (compressed air supply) to charge air system tester -V.A.G 1687-. |
Note If there is water in the sight glass, drain at water drain screw -6-. |
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| 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. |
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| Open valve -4- and wait until the test circuit is filled. If necessary readjust pressure to 0.5 bar. |
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| 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
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