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Replace a Spare part Catalytic Converter (Katalysator) – a defective one or if the limit of use has been already reached. Find out useful information about Catalytic Converter (Katalysator)

Catalytic convertor is a part of the exhaust system that is designed to reduce the toxicity of exhaust gases through the reduction of nitrogen oxides, as well as the use of the resulting oxygen for afterburning of carbon monoxide and unburned hydrocarbons. Stoichiometric ratio of fuel and oxygen is a key requirement for the successful operation of the catalytic convertor. In other words, its main function is to reduce the amount of harmful substances in exhaust gases produced by car.

Catalytic convertor is located on a receiver pipe or after it. Inside the convertor there is a ceramic cell structure. These cells are necessary to increase the contact area of exhaust gas with the surface, which is covered with a layer of platiniridium. Due to this in contact with the surface of the catalyst layer unburned residues are oxidized with oxygen. As a result, the catalytic convertor is warmed up by the heat evolved and the oxidation reaction is activated. Thus its main goal is achieved – at the outlet exhaust gases contain only carbon dioxide and nitrogen.

However, there are engines that do not cope well with the reduction of emissions. Among them there are engines of old cars and some diesel engines. The cause of the problem of diesel engines is the fact that they themselves operate in a different temperature conditions - lower than gasoline. As for the catalytic convertor breakdown, the carmaker company itself defines when trouble codes are displayed on the dash panel.

Very often there is an error indicating the failure of the catalytic convertor, even when everything is normal. The part can not work as efficiently as possible, but at the same time still it works well. In most cases, the catalytic convertor operating life is more than 250. 000 kilometres, but it happens that the part goes down much earlier. This occurs when the convertor t is contaminated by foreign substance in the low-quality gasoline or when in the engine cylinders there is an insufficient compression. You will easily find new car parts, like hydraulic filter or spring pressure regulator in the Internet stores where goods are much cheaper and delivery of necessary parts is much faster.

Catalytic Converter (Katalysator) for PEUGEOT 206 Hatchback (2A/C), PEUGEOT 206 Hatchback (2A/C), PEUGEOT 407 SW (6E_)

Faults of the catalyst
  • mechanical damage to the catalyst shell;
  • damage or destruction of converter cells;
  • destruction of the system chemical catalyst.
Symptoms of the catalytic converter failure
  • engine shut off when idling;
  • hindered start of the engine;
  • light blue or blue-gray color of the exhaust gas;
  • deterioration of acceleration and the engine on-speed;
  • presence of strange noise in the exhaust system;
  • «Check Engine» indicator reading on the instrument panel;
  • a significant increase in fuel consumption (up to 1.5-2 l/100 km);
  • odor of hydrogen sulfide in the exhaust system;
  • appearance of the metal stains on the catalyst case.
Causes of catalyst faults
  • use of ethanol-blended fuel;
  • use of low-quality fuel;
  • failure of the combustible mixture formation and change of its optimal proportions;
  • unburned fuel or oil getting in the catalyst;
  • converter internal cells damage;
  • catalyst clogging with fuel combustion products;
  • a significant excess of the part service life;
  • improper use.
Diagnostics

Inspection of the catalyst can be performed only at service stations, because the system analysis requires special equipment and specific skills. Independently, you can only assess the structural condition of the part. If it has mechanical damages, even in the absence of fault signs you will soon need replacement of the catalyst.

Cell throughput is measured via pressure gauge connected instead of the first oxygen sensor. After this procedure you need to accelerate the engine to 3000 rpm. Normal system pressure should not be higher than the level of 0.3 kgf / cm2 or 2.94 Pa.

The service life of the catalytic converter is designed for 100 000-150 000 kilometers. Exceeding it is strongly not recommended, because the decrease in capacity of the catalyst cells and resulting increased pressure in the system may cause an engine failure.

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