2.8L - Exhaust System, Emission Controls - AFP, BDF (A4 Platform)

• Exhaust system, Emission controls
  • Exhaust system components, removing and installing
    • Notes
    • Exhaust manifold, front exhaust pipe with Three Way Catalytic Converter (TWC) and attachments (Vehicles with engine code AFP)
    • Exhaust manifold, front exhaust pipe with Three Way Catalytic Converter (TWC) and attachments (Vehicles with engine code BDF)
    • Mufflers with mounts
      • Notes
      • Installation position of double clamp
      • Aligning front muffler parallel
      • Installation position of muffler suspension
      • Separation point at exhaust pipe
      • Installed position of end pipes of rear muffler
    • Aligning exhaust system
      • Recommended special tools and equipment
      • Procedure
    • Three Way Catalytic Converter (TWC), checking
      • Function test
  • Secondary Air Injection (AIR) system
    • Notes
    • Function
    • Parts of Secondary Air Injection (AIR) system, removing and installing (Vehicles with engine code AFP)
      • Notes
      • Relay position assignment in protective housing (engine compartment, left)
    • Parts of Secondary Air Injection (AIR) system, removing and installing (Vehicles with engine code BDF)
      • Notes
      • Relay position assignment in protective housing (engine compartment, left)
    • Checking secondary air system for proper seal
      • Function test
      • Checking Proper Seal
    • Secondary Air Injection (AIR) valve, checking
      • Notes
      • Recommended special tools and equipment
      • Test requirements
      • Test sequence
        • Vehicles with engine code AFP
        • Vehicles with engine code BDF
        • Continuation for all vehicles
    • Secondary Air Injection (AIR) pump motor, checking
      • Recommended special tools and equipment
      • Test requirements
      • Test sequence
        • Notes
        • Vehicles with engine code AFP
        • Vehicles with engine code BDF
        • Continuation for all vehicles
    • Combination valve, checking
      • Recommended special tools and equipment
      • Test requirements
      • Test sequence
        • Vehicles with engine code AFP
        • Vehicles with engine code BDF