Valve, Glossary and Terms, Automotive, Motorcycle, Boat Dealers
List of United States Automotive, Motorcycle, Boat, Dealers, Service Stations
A device that can be opened or closed to allow or prevent the flow of a liquid or gas from one place to another. Most internal combustion engines use intake and exhaust valves to allow fuel/air mixture into the cylinders and to exhaust burnt gases. Some engines have four valves per cylinder, which increases total valve area for increased efficiency and performance.