Understanding the Exhaust System

Understanding the Exhaust System


Many factors can affect the life of a vehicle’s exhaust system. Learn more here.

WHAT IS THE EXHAUST SYSTEM ?

An exhaust system is a complex automotive parts assembly which performs a series of critical emissions functions

Typically made of cast iron or fabricated tubing, it sometimes incorporates the catalyst, and is connected to the engine at the exhaust ports with flange connectors. It is designed to collect exhaust gases from each cylinder, then funnel them into a common outlet

Allows normal engine movement to prevent damage to the exhaust system.

Converts harmful engine emissions to CO2 and water.

Detect the level of O2 in the exhaust stream. This information is utilized by the PCM for fuel control, and to monitor converter efficiency.

Required accessories for proper sealing and durability.

Resonator assemblies combine pipe routing and tuning technologies for quality flow and acoustics.

The muffler quiets the sound of a vehicle’s engine as emissions pass out of the exhaust system.

WHY EXHAUST SYSTEMS WEAR OUT ?

The exhaust system is one of the very few parts on a vehicle that continues to wear even though the engine is not running and the vehicle is stopped.

  • Uncontrolled environment (weather, temperature, road condition)
  • Vehicle usage
  • Condition of exhaust components within the system
  • Manufacturer’s materials

  • Acidic moisture is produced by the combustion of air and gasoline
  • Acid build-up occurs when the engine and exhaust system don’t have a chance to fully warm up
  • Because these acids are in contact with the inside of the exhaust system, the deterioration of these parts occurs primarily from the inside out

REASONS TO REQUIRE EXHAUST REPLACEMENT ?

Many wear factors mandate exhaust system replacement to control harmful emissions and maintain safe vehicle operation.

  • Pipe leaking
  • Body shell distorted, affecting performance or structural integrity
  • Corrosion hole
  • Missing component(s)
  • Cracked or broken mounting brackets
  • Puncture (other than a drain hole)
  • Rattling or knocking noise from muffler
  • Open or split seams (exhaust leaking)
  • Leaking flexible couplers
  • Plugged converter

REASONS TO SUGGEST EXHAUST REPLACEMENT

Additional reasons technicians may suggest exhaust system replacement.

  • Part is close to the end of its useful life*
  • Address a customer need, convenience or request (eliminate noise, performance upgrade, etc.)
  • A technician’s recommendation, based on substantial and informed experience*
  • Comply with maintenance recommended by the vehicle’s Original Equipment Manufacturer(OEM)