Charge Air System, Checking For Leaks
Charge Air System, Checking for Leaks
Special tools, testers and auxiliary items required
• Turbocharger Testing Unit (V.A.G 1687)
• Adapter (V.A.G 1687/10)
• Adapter (V.A.G 1687/11)
• Adapter (V.A.G 1687/12)
• Ultrasonic Tester (V.A.G 1842)
- Remove the noise insulation.
- Loosen the hose clamp - arrow -, pull off the air guide hose and move it to the side.
- Depending on the hose diameter, install the (V.A.G 1687/10) , (V.A.G 1687/11) or (V.A.G 1687/12) into the air guide hose - 1 - and secure it with a hose clamp.
- Connect the (V.A.G 1687) as illustrated.
Prepare the (V.A.G 1687) as follows:
- Remove the pressure regulator valve - 2 - and close valves - 3 and 4 -.
• Pull the knob in order to rotate the pressure regulating valve - 2 -.
- Connect the (V.A.G 1687) to compressed air - 1 - with a commercially available adapter piece.
• If there is water in he viewing glass, drain it through the drain plug - 6 -.
- Open the valve - 3 -.
Damage could result if the pressure is set too high.
• Pressure must not exceed 0.5 bar!
- Set the pressure to 0.5 bar using the pressure control valve - 2 -.
- Open the valve - 4 - and wait until the test circuit is filled. Regulate the pressure to 0.5 bar again if necessary.
- Listen, feel and use commercially available leak detection spray or the (V.A.G 1842) to check the charge air system for leaks.
• A small quantity of air dissipates via valves in engine. A pressure retention test is not possible for this reason.
• Refer to the (V.A.G 1842) see operating instructions.
• Release the pressure in the test circuit by pulling off the coupling before removing the adapter.
• The hose connections as well as the air guide pipes and hoses must be free of oil and grease before installing.
• Secure all hose connections with hose clamps of the same type as those equipped by the factory. Refer to the Parts Catalog.
• To mount the air guide hoses on their connectors securely, spray the bolts on the used clamps with rust remover before installing.