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Note There is a danger of a “hose detaching” whilst driving after re‐ moving and reinstalling charge pressure lines with spring-type clamps. For this reason, spring band rings are used which can be opened if a defect item requires the charge pressure line has to be disconnected. In cases of repair, destroy the spring band ring using a suitable tool and renew it with a replacement part from ⇒ ETKA (electronic parts catalogue) . 1.7 Checking charge air system for leaks Special tools and workshop equipment required with clip. Prepare charge air system tester -V.A.G 1687- as follows: – Turn pressure regulating valve -2- anti-clockwise onto stop. Note To turn the pressure regulating valve -2- the knob must be pulled upwards. 4-cylinder diesel engine (1.9 l engine) - Edition 01.2009 162 Rep. Gr.21 - Turbocharging/supercharging
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