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The PCV Valve embodies one of the Chevrolet Metro automobiles' most significant component since it is in charge of emission control and the outstanding performance of the auto engine. The PCV Valve safely returns gases from the crankcase back to the combustion chamber to be burned thus avoiding environmental pollution and dangerous oil sludge build up. As a result of depending on intake manifold vacuum conditions, the PCV Valve allows little amount of gas to pass through at idle to prevent lean running and allows more blow-by gases to pass through at full load. Also, it serves the purpose of flame arrester to prevent the crankcase being subjected to positive pressure events. Routine servicing of the PCV Valve also helps to avoid some of the associated problems like fouled up engine oil, high fuel rate, and expensive repairs.