GEDDES EXHAUST CATS CATALYTIC CONVERTERS

AUCKLAND 636-7064

Geddes Automotive Auckland stock and replace exhaust cats. Broken, blocked &/or overheating exhaust cats replaced.

An exhaust cat is the short name for an exhaust catalytic converter.

The exhaust cat´s prime purpose is to clean and convert the vehicles exhaust gases into gases less harmful to people, animals, birds etc that breath air / oxygen.

The engine management system has an oxygen sensor before and some have a sensor after the exhaust catalytic converter. If the exhaust cat is damaged or removed it can upset the readings these sensors provide to the vehicles computer.

This can upset the computer management systems. Exhaust cats nearly always have a heat sensor in the body. If the heat build up is too high it can set a computer management fault and illuminate the exhaust cat dash light like the symbol displayed above.

If this light comes on it is warning you that something is wrong. You should seek advise. Sometimes the computer will put the engine into a safe mode which is a reduced power mode. Sometimes it will only allow you to drive very slowly.

FAILED YOUR WOF
If you have failed your WOF because the Cat/converter dash light is on, Geddes can fix this for you. We have computer scanning equipment to check your computer systems.

BROKEN CATALYTIC CONVERTERS
Catalytic converters are designed to change harmfull compounds (gasses like carbon monoxide) into harmless compounds and steam. The cat must be hot for this process to work. The steam causes corrosion of your exhaust.

With age and use the cats can crack and usually begin to rattle. They should be replaced before they break up otherwise the broken pieces can travel down the exhaust pipe and into the muffler or mufflers.

When they begin to break up they usually cause more back pressure and the vehicles engine can loose power. (Refer to the photo above.)

If the engine is not operating efficiently (burning oil, oil going into the exhaust, raw fuel going into the exhaust) this will likely destroy the cat. We have removed cats that have melted the internal parts almost closing off the exhaust. If you ignore the problem you can destroy the engine.

As soon as the the cat light on your dash board illuminates, seek advice.

Although a cat can be by-passed, this can affect the sensors readings for your engine control management. We understand that at some time in the future, vehicles will require cats in the exhaust to pass emission testing.