Exhausts - Car-Tech


Car Tech have swiftly become the ‘go to’ for replacement exhausts in Leighton Buzzard. We can quickly diagnose any leaks or problems with your vehicles exhaust system and offer a competitive price to repair or replace.

A vehicle exhaust, also known as an exhaust system, is a network of pipes, silencers (muffler), and converters that work together to:

  • Channel and expel harmful exhaust gases: As the engine burns fuel, it creates a mixture of hot gases, including carbon monoxide, nitrogen oxides, hydrocarbons, and other pollutants. The exhaust system collects these gases from the engine and directs them away from the passenger compartment and the environment.
  • Reduce noise: The system utilizes silencers and resonators to dampen the loud sounds generated by the engine’s combustion process, resulting in a quieter driving experience.
  • Control and reduce emissions: Some components, like catalytic converters, chemically convert harmful pollutants into less harmful substances before releasing them into the atmosphere, contributing to cleaner air.

Exhaust Diagram - CarTech

The key components of an exhaust:

  • Exhaust manifold: Collects hot gases from each engine cylinder and channels them into a single pipe.
  • Down Pipe: a piece of exhaust that usually connects the exhaust manifold to the catalytic convertor
  • Diesel Particulate Filter (Diesel vehicles): a device installed in the exhaust system of modern diesel engines to capture and remove soot particles before they are released into the atmosphere (Learn More)
  • Catalytic converter: Uses precious metals to convert harmful pollutants like carbon monoxide and nitrogen oxides into less harmful substances like water vapor and carbon dioxide.
  • Silencers (muffler): Absorb sound waves and dampen engine noise, reducing overall noise pollution.
  • Resonators: Additional chambers further reduce specific sound frequencies, contributing to quieter operation.
  • Tailpipe: The final point where the exhaust gases are released from the vehicle.

Exhaust Diagram 2 - CarTech

Overall, the car exhaust system plays a crucial role in:

It’s important to note that exhaust systems require regular maintenance, including inspections for leaks, component damage, and proper emission control. This ensures your car operates efficiently, minimizes environmental impact, complies with emission regulations and more importantly keeps the vehicles cabin safe from harmful gas.

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Diesel Particulate Filter (DPF)

We know all too well when a DPF light shows on the dashboard how annoying this can be.

The most important thing to remember is to check your owners’ manuals as by turning the vehicle on and off repeatedly can damage your vehicle if the DPF completely blocks.

We offer a regeneration service for your DPF as well as fuel additives that will help to clean your DPF. If these items do not work then we can replace your DPF for a new part at competitive price.

A DPF is a device installed in the exhaust system of modern diesel engines to capture and remove soot particles before they are released into the atmosphere. These soot particles, also known as black smoke, are harmful pollutants that contribute to air pollution and respiratory problems.

How a DPF Works

  1. Trapping soot particles: Exhaust gas containing soot particles flows through the DPF, which has a fine mesh filter that traps these particles.
  2. Regeneration process: Over time, the trapped soot needs to be removed to prevent the filter from clogging. This process, called regeneration, can occur passively or actively:
    • Passive regeneration: Under certain driving conditions, such as sustained highway driving at high temperatures, the soot particles burn off naturally in the exhaust stream.
    • Active regeneration: If passive regeneration isn’t sufficient, the engine management system automatically initiates an active regeneration process. This involves injecting additional fuel into the exhaust to increase the temperature and burn off the trapped soot.

Benefits of DPFs

  • Reduced air pollution: By capturing and removing soot particles, DPFs significantly reduce harmful emissions and contribute to cleaner air.
  • Improved engine efficiency: Some DPF designs can also improve fuel efficiency by optimizing exhaust flow.
  • Meeting emission standards: DPFs are crucial for modern diesel engines to meet increasingly stringent emission regulations.

Things to consider:

  • Regeneration cycles: Knowing when regeneration cycles occur and following specific driving patterns can help optimize the process and prolong filter life.
  • Maintenance: Periodic maintenance and checks on the DPF system are important to ensure its proper functioning.
  • Fuel quality: Using high-quality diesel fuel can help prevent problems with soot accumulation and regeneration. We always recommend Shell or BP as they have additives that help maintain your engine and DPF.

Overall, diesel particulate filters are essential components in modern diesel engines, playing a significant role in reducing air pollution and meeting emission standards.

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