The exhaust gas recirculation cooler cools down the gases from the exhaust before it is recirculated. There is a unit that has a tube where exhaust gas flows, while another part is flooded with coolant.
EGR cooler operationThe EGR cooler is an important part of the vehicle since it allows the cooling of exhaust gases and it goes back into the engine for combustion. It eliminates the intake temperature which could result in lower combustion temperature. And there is a reduction in emissions as well as controlled internal engine air temperature.
Common issues with a faulty EGR coolerA faulty EGR can lead to lower coolant levels, leakage, and smoke coming out of the exhaust.