cat-1The catalyzer or catalytic converter was invented in the 1970s. In compliance with standard EURO 1, it became mandatory in all vehicles in 1993.

How does the catalytic converter work? Does it have to undergo maintenance? Can it be removed? Take a look at our answers to frequently asked questions.

The role of the catalytic converter is to transform exhaust gases into innocuous gases; the converter consists of a stainless steel chamber which houses a bees nest type structure made of ceramic also known as the catalytic surface; it is quite large and converts 90% of exhaust gases into innocuous gases.

The catalytic converter is part of the exhaust system, and is usually located at the engine’s outlet.


Functional principle

Functional principle of the catalytic converter.

The catalytic converter contains at least three precious metals; these catalytic elements cause a chemical reaction that leads to conversion once the temperature has reached 400°C.

There are two different types of catalytic converter.

  • The catalytic converter for gasoline engines: This three-way converter causes three reactions at the same time.
  1. One reaction turns nitrogen oxide into nitrous oxide and carbon dioxide.
  2. Another reaction causes the oxidation of carbon monoxide turning it into carbon dioxide.
  3. The third reaction causes the oxidation of unburnt hydrocarbons (HC) turning them into carbon dioxide and water.
  • The catalytic converter for diesel engines: This two-way converter turns carbon monoxide and unburnt hydrocarbons into carbon dioxide and water, while, at the same time, reducing the amount of diesel fuel particles.

It does not, however, eliminate nitrogen oxide (NOx) or the amount of particles emitted, which is why it is often paired up with a DPF (since the year 2000).

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A catalytic converter maintains optimum functioning for an average of 62,000 miles; with any mileage beyond that, the engine’s performance will be reduced due to build up.

Problems that arise

Unfortunately, the catalytic converter does not reach its functioning temperature (400°C) on a daily basis. It clogs up faster, causing the following:

  • An impaired catalyzercat-3
  • A clogged catalyzer
  • An impaired catalytic converter
  • A clogged catalytic converter
  • Loss of power
  • Engine wheezing
  • Stalling engine
  • Drowning engine
  • Engine that does not shift
  • Uses too much fuel



Although it is possible to remove the catalytic converter with a tube called a cat eliminator pipe, doing so is against the law.

Additionally, removing it will cause your vehicle to automatically fail its emissions inspection due to excess pollution.

Soon, a new anti-pollution control will make its debut. You will be able to follow the evolution of this new control technology which will be taking the market by storm in 2019 on our web page “all you need to know on the evolution of control technology”.


The best solution

Instead of replacing your catalytic converter, which is an expensive task, consider descaling! Thanks to its innovative process involving the power of post-combustion hydrogen solvent, the Hy-Calamine device reduces clogging in the catalytic converter by allowing it to reach a temperature of 400°C so that catalysis can take place. Your vehicle regains its original performance, and issues such as a drowning engine, stalling, loss of power due to a clogged or blocked catalytic converter disappear!

If you add descaling to your routine maintenance, your engine will be clean and you will be able to avoid all these headaches.