What Is a Catalytic Converter?
The catalytic converter is a device located in the exhaust system of all
modern motor vehicles. It is an important device in the exhaust gas de-pollution
process, which reduces harmful environmental exhaust emissions of motor
vehicle’s combustion cycle by-products.
Its function is to chemically change harmful pollutants that the engine
has combusted in the process of its various starting, driving, power and
What Are The Pollutants?
These pollutants include carbon monoxide, hydrocarbons, nitrous oxides,
etc. A catalytic converter chemically changes these into harmless substances
like carbon dioxide, nitrogen and water vapour.
How Are Harmful Exhaust Pollutants Eliminated?
The catalytic converter uses an inside structure called a substrate. This
is a ceramic or stainless steel monolith block that is covered with precious
metals such as platinum, palladium and rhodium. The monolithic block consists
of many fine channels, which are covered by a coarse washcoat above which
the catalytically effective precious metal layer is placed. It is these
elements, which cause the chemical change.
Catalytic Converter Longevity In Service
For a catalytic converter to last in normal vehicle service operation,
it is essential the engine, its ignition system, fuel system, and emission
devices must all operate within manufacturer specifications properly,
consistently, efficiently and correctly at all times.
If the catalytic converter you replaced or are about to replace was damaged
or destroyed by the melting of the ceramic monolithic structure or the
metallic substrate, it means that excessive amounts of liquid fuel particles
reached the catalytic converter substrate. When this occurs, it raises
temperatures, causing the substrate to exceed its fusion point of around
1,500 degrees Fahrenheit, thus harming the substrate.
In such instances, THE INSTALLER MUST FIRST LOCATE AND CORRECT THE CAUSE
OF THE MONOLITHIC OR SUBSTRATE MELTING AND IN PARTICULAR ENSURE THAT ALL
THE ENGINE, IGNITION, FUEL AND EMISSION SYSTEM/S AND OR DEVICES ARE OPERATING
correctly before replacing or renewing the catalytic converter.