What is an overhead valve system?

An overhead valve (OHV) system is an engine design where the valves are located in the cylinder head above the combustion chamber, rather than in the engine block. This configuration allows for more efficient airflow into and out of the engine, improving performance and fuel efficiency. OHV systems typically utilize pushrods and rocker arms to actuate the valves, which can lead to a more compact engine design. This type of valve arrangement is commonly found in many modern internal combustion engines.