OHV timing is a type of piston combustion engine valve timing where the valves are located in the cylinder head, and the camshaft is located in the engine block. The designation of this type of distribution is derived from the English name Overhead Valve.

With this type of distribution, there is a relatively large distance between the camshaft and the valves. In the case of OHV distribution, the valves are therefore operated using metal lifters, lifting rods, and cams from below.