Catalytic converter - general information and precautions

Emission control and exhaust systems / Catalytic converter - general information and precautions

The catalytic converter is a reliable and simple device which needs no maintenance in itself, but there are some facts of which an owner should be aware if the converter is to function properly for its full service life.

a) DO NOT use leaded petrol in a car with a catalytic converter - the lead will coat the precious metals reagents, reducing their converting efficiency and will eventually destroy the converter.

b) Always keep the ignition and fuel systems well-maintained in accordance with the manufacturer’s schedule.

c) If the engine develops a misfire, do not drive t he car at all (or at least as little as possible) until the fault is cured.

d) Do NOT push- or tow-start the car - this will soak the catalytic converter in unburned fuel, causing it to overheat when the engine eventually starts.

e) Do NOT switch off the ignition at high engine speeds.

f) in some cases a sulphurous smell (like that of rotten eggs) may be noticed from the exhaust. This is common to many catalytic converter-equipped cars and once the car has covered a few thousand miles the problem should disappear. Low quality fuel with a high sulphur content will exacerbate this effect.

g) The catalytic converter, used on a wellmaintained
and well-driven car, should last for between 50 000 and 100 000 miles - if the converter is no longer effective it must be renewed.

h) Do NOT use fuel or engine oil additives - these may contain substances harmful to the catalytic converter.

i) DO NOT continue to use the car if the engine bums oil to the extent of leaving a visible trail of blue smoke as this will contaminate the catalyst.

j) The catalytic converter operates at very high temperatures. DO NOT park the car in dry undergrowth, over long grass or piles of dead leaves after a long run.

k) Remember that the catalytic converter is FRAGILE - do not strike it with tools during servicing work.