Exhaust System, Checking For Leaks
WARNING: This page is about a different car, the 2010 Audi Q7, 2009 Audi Q7, 2008 Audi Q7, and 2007 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
-- Start the engine and let it run in idle.
-- Seal the tail pipes for the leak test, for example using cloths or plugs.
-- Listen to see if connections points at exhaust manifold to cylinder head, pre-catalytic converters to exhaust manifold, etc. are leaking.
-- Correct leaks.