Honda 18011-RCA-A00 Valve Set, EGR

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Nitrogen oxides or NOx is a generic term that summarises the individual elements formed in combustion chambers due to incoming air oxygen/Nitrogen combining due to high combustion temperatures. When NOx is released in the atmosphere from the tailpipe it combines with reactive organic compounds, hydrocarbons, and sunlight to form a photometrically active ozone smog. The EGR system works by passing exhaust gases from the exhaust manifold through the EGR valve to the intake manifold then to the combustion chambers where they are allowed to mix with the air-fuel mixture, thus cooling the chambers and hence minimize on emission of NOx. The EGR system has the PCM, the EGR valve, the position sensor of the EGR valve and several sensors telling the PCM when to open the EGR valve. The EGR rate of flow is the amount of opening of the EGR valve measured as ''EGR valve lift'' and is adjusted by the PCM with reference to the working conditions. The position sensor measures the amount of lift of the EGR valve and sends this signal to the PCM which in turn varies the amount of current supplied to the valve in order to get the right lift. If the flow of EGR is not suitable for the conditions, the PCM brings current to zero to close the valve. Before the replacement of the EGR valve, switch off the ignition using the key and then unplug the connector of the EGR valve. Subsequently, unbolt the EGR valve and pull out the valve and get rid of the mounting nuts. Remove the old gasket and get rid of all the remains of the gasket on the mating surfaces without causing any harm to them. Last of all, place the fresh EGR valve gasket and turn the mounting nuts to the right until you hear a fast clicking sound.

First of all, the EGR system cools these by recirculating exhaust gases into the combustion chambers. It contains several components including sensors, EGR valve, and PCM. It is responsible for determining or rather deciding on the most appropriate height required for lifting the EGR valve. The current flow to the EGR valve is adjusted by the PCM depending on specific conditions experienced while operating. To replace this, remove the engine cover, disconnect the electrical connector, remove the valve and old gasket. For installation, install a new valve and gasket.

The EGR system recirculates exhaust gases from the exhaust manifold, through the EGR valve and intake manifold, then back to the combustion chambers.

The EGR system reduces oxides of nitrogen by recirculating exhaust gases from the exhaust manifold, through the EGR valve and intake manifold, then back to the combustion chambers. This dilutes the incoming air/fuel mixture, cools the combustion chambers, and reduces NOx emissions.

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