An exhaust system is a succession of pipes and boxes designed specifically to channel emissions away from the face of the vehicle, decrease engine noise and keep optimum fuel efficiency. It links the engine to a silencer and a catalytic converter. The tailpipe is the component of the exhaust that you can see extending from the rear of the vehicle. The silencer connects onto the tailpipe, and then a series of more pipes connects the silencer to the catalytic converter, and then the engine. The silencer has metal tubes that have a series of holes drilled into them. Exhaust gases leave the engine at really high pressures, and the outlets in the silencer help to decrease that pressure so that they leave the car quietly.

The significance of keeping a healthy exhaust system and the blow a faulty exhaust system can have on the surroundings is not something people always think about.

All exhausts give off six gases as emissions; of the six, three are not so harmful (N2,CO2 and H20) and three are really harmful (CO, NO2 and N2O). The work of the exhaust, catalytic converter and monitoring system is to keep the right balance of emissions, check that the engine is running competently and move the gasses away from the vehicle passengers.

Under current regulations a Police officer can merit the elimination of any vehicle from the road on the doubt that it is producing too much amounts of noxious waste gases from the exhaust. And if your vehicle exhaust system is busted and noisy your vehicle will come under police inspection. Your vehicle will also not pass its MoT test if the exhaust system has trouble resulting in wrong emissions levels being documented.

An important part of current exhaust systems are the ‘Catalytic Converters’. These modify the properties of harmful gasses given off by the engine combustion chambers in to a more earth-friendly emission. All petrol cars that were created from 1993 have catalytic converters built-in and all diesel cars from 1997.

The gas discharge level for your vehicle is set by the vehicle company and imposed at the time of a MoT test; however there has been a lot of dispute within the European Commission regarding whether these settings must become compulsory. If a mandatory level is to be strengthened by law, the effect could be extra regulatory controls to make certain that all motorists maintain their vehicle discharges within a set tolerance level.

Exhausts can rust from both inside and outside. How long your exhaust system will last will depend on the distance and frequency that your vehicle has been used. Vehicles that are used mostly for long journeys tend to corrode in a longer time as compared to those vehicles that are used frequently to drive around town.

It is very good practice to maintain your vehicles and keep them in great condition. It is recommended that you have your vehicle discharge and exhaust system examined at least twice a year for faults, leaking joints, out of order hangers, worn rubber mountings, corrosion, botched gaskets and increased levels of pollutant gasses.

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