The EGR cooler on a 6.0-liter Powerstroke engine is an important element of the EGR system. For the EGR system to work properly, the cooler must also work properly. The EGR system reduces nitrous oxide (NOx) emisisons by recirculating exhaust gas back into the engine. The recirculated gas also helps increase fuel mileage and reduce detonation by making the engine run cooler.
Exhaust gas is hot, so in order for the recirculated exhaust gas to do its job, the system must cool it before allowing it to go back into the cylinders. The EGR cooler cools the exhaust gas to the temperature most beneficial to the engine. It also reduces the amount of nitrous oxide created by the engine. Nitrous oxide forms when oxygen and nitrogen are introduced to high temperatures. By using the EGR cooler to cool recirculated gas into the cylinders, the cylinders run cooler, thus decreasing the amount of nitrous oxide produced.
Be sure to keep your EGR system, including the EGR cooler in good working condition so that you get the optimum mileage from your Powerstroke 6.0-liter engine. If the EGR cooler or any other part of the system fails or doesn’t work properly, replace the part as soon as possible. You could effectively damage the engine if the exhaust routed back into the engine causes it to overheat.