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Exhaust gas recirculation system - vehicles with engine letter code APG > < Stress-free alignment of exhaust system

A3 Mk1

4-Cylinder engine (5-valve), Mechanics
Removing and installing parts of exhaust system
Checking exhaust system for leaks
  • ‒ Start engine and run at idling speed.
  • ‒ Plug tailpipes (e.g. with rags or stoppers) until check is completed.
  • ‒ Listen for noise at the connection points (cylinder head/manifold, manifold/front exhaust pipe etc.) to determine whether there are any leaks.
  • ‒ Rectify any leaks that are found.

Exhaust gas recirculation system - vehicles with engine letter code APG > < Stress-free alignment of exhaust system