Audi Workshop Service and Repair Manuals > A4 Mk2 > Power unit | 4-cylinder engine (2.0 ltr. 5-valve), mechanics | Exhaust system | Removing and installing parts of exhaust system

Checking exhaust system for leaks

–	Start engine and run at idling speed.

–	Seal tailpipes during leak test, e.g. with cloth or plug.

–	Listen for leaks at connection points between cylinder head/exhaust manifold, exhaust manifold/catalytic converter and catalytic converter/front exhaust pipe, etc.

–	Rectify any leaks that are found.

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