| 21. | Initially, the 131 was offered with 1.3 L and 1.6 L overhead valve engines.
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| 22. | Dollar made its own engines, but also used " Chaise " overhead valve engines.
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| 23. | The engine was of conventional design as a water-cooled vertical straight-4 with overhead valves.
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| 24. | The cars came with a four-cylinder engine of 6.3L in capacity, with overhead valves.
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| 25. | Overhead valve : " This is like having an engine just like a car,"
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| 26. | It has a total of eight overhead valves, and features a rotating valve design.
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| 27. | In 1928, Arthur filed with the US Patent Office for an'Overhead Valve Engine '.
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| 28. | The engines have overhead valves and an overhead cam.
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| 29. | The engine incorporated several innovative features including overhead valves.
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| 30. | Starting in the 1950s, Checker offered an optional overhead valve version of the Continental six.
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