Exhaust System, Checking For Leaks
WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Procedure
-- Start the engine and let it run at idle.
-- Seal the tail pipes with cloths or plugs during the leakage test.
-- Check the connections exhaust manifold to cylinder head, intermediate pipe to exhaust manifold and turbocharger to particulate filter for leaks.
-- Repair detected leaks.