A8 Quattro Sedan V8-4.2L (BVJ) (2008)
Air Injection Control Valve: Testing and Inspection
Version 2
Secondary Air Injection Combination Valves, Checking for Function and Leaks
Special tools, testers and auxiliary items required
‹› Hand Vacuum Pump (VAS 6213)
Procedure
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Pull rear engine cover off - arrows -.
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Remove the vacuum hose - 3 - from the secondary air injection combination valve - 2 -.
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Remove the secondary air hose - 1 - by pressing the release buttons.
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Connect the Hand Vacuum Pump (VAS 6213) to the vacuum connection - 1 - on the secondary air combination valve that will be tested.