EGR valves help enhance diesel engines as it reciprocates exhaust gas back into the combustion process. This process lessens the temperature during combustion which burns the fuel completely resulting in a lesser formation and emission of nitrogen oxide (Nox).  As a result of this cycle of circulation and recirculation, dust and carbon deposits from the exhaust gas may accumulate.  These particles block the opening of the valve and therefore hinder in the process of recirculation. This blockage can restrict the turbo and inter-cooler and eventually restricts the engine to perform in top performance. Also, fuel economy is reduced as a result of the hindered circulation. It is necessary by then to remove the EGR valve and temporarily replace it with EGR blanking removal kits. The less confined circulation of the exhaust gas, the more power the engine gains. A good clean of the inlet manifold allows the gas to circulate freely without restriction. The engine is then able to breathe fresh air and return to its normal condition and high performance.

Carbon deposits

Diesel engines, unlike petrol engines, discharge relatively small carbon monoxide. Upon emission of exhaust gas, some carbon deposits stick to the opening of the EGR valve, blocking the recirculation process of the EGR system. A restricted air flow can lessen the exhaust gas needed by the turbo to perform efficiently. Basically, you will be just infusing the same level of fuel to the chambers but there is no longer enough air to make a perfect mix to achieve the needed combustion that results in cooler temperature resulting in a huge lapse of power. Not only does it disrupt the proper recirculation process, it also contributes in massive pollution as it releases un-burnt fuel in the form of black smoke called “exhaust smoke”.


Failure of EGR valves

Due to the carbon deposits blocking the opening of the valve, the EGR system can no longer execute the intended reasons for its installation. Instead, this will counteract all the benefits upon installation. The primary purpose of reducing the nitrogen oxide is completely reversed to its opposite as it produces more exhaust gas. More exhaust gas means more nitrogen oxide emission.  When exhaust smoke is already present, it is already clear that the EGR valves have already failed and are already becoming a disadvantage and burden to the owner of the automobile. Further measures must then be done to bring back the engine’s previous condition.

Conclusion

With today’s rising prices, it would be very much costly to change engines. It will be very much practical to maintain the good condition of the engine. Therefore, it is best that the EGR valves must be removed every now and then, temporarily replacing it with EGR blanking removal kits. This is the same as the saying goes, “it is much better to prevent than cure a disease”. The installation of this removal kit will be more cost-efficient than ignoring the continuous blocking of carbon deposits which will result to very poor engine performance. Time, money and efforts will be saved if the EGR system is religiously monitored every now and then.