Glossary of Automotive Components/Terms
PCV Valve/Positive Crankcase Ventilation Valve
Removes partially-burned gases and moisture from the crankcase. Improves economy and reduce emissions while preventing buildup of sludge and corrosion in the engine.
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Before the PCV valve was mandated in the early 1960's the crankcase fumes were vented into the atmosphere. Now the crankcase is a closed system which is not only good for the environment but keeps the engine and engine oil much cleaner.
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