Exhaust gas recirculation (EGR) engines use coolant to lower the temperature of the exhaust. Their purpose is to reduce the emission of nitrogen oxides from diesel trucks that cause smog.
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These problems result mainly from poor combustion, which stifles the engine.
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The reason that EGR coolers have the ability to be able to reduce the level of nitrogen oxides in that these compounds require a high temperature in order to trigger the chemical reaction required to form them. The EGR cooler is a simple device that simple diverts a portion of the exhausts that are formed during the regular operation of the diesel engine through a tube that includes a series of honeycombs or steel tubes that slow down the movement of the gas and encourage the transfer of heat energy from the gas to the powerstroke filter material before pumping it back through the combustion chambers. The introduction of the cooler gas then lowers the operating temperature of the engine and reduces the production of nitrogen oxides. This cycle occurs continuously during the operation of a diesel engine.
How to clean an EGR Cooler?
1 Turn off the car and open the hood.
2 Remove the intake manifold hose and the air intake hose from the manifold typically found on the side of the engine.
3 Unplug the PVC heating element.
4 Remove the changeover valve of the intake manifold by removing the two hex bolts.
5 Remove the vacuum lines of the anti-shudder valve and EGR.
6 Remove the turbo intake pipe by removing a clamp and a hex bolt.
7 Remove the three bolts that secure the EGR.
8 Apply de-greaser to the intake of the EGR and wipe it clean.
9 Re-assemble the components you removed from the engine compartment using new gaskets.
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