Overhead Valve (OHV) Engines

As the name implies, Overhead Valve engines (OHV) have the valves located above the combustion chamber, in the cylinder head.

The OHV layout permits

  • smoother fuel mixture intake,
  • quicker and more complete exhaust.

The increased combustion efficiency enables a higher compression ratio to be used. This makes it possible to obtain a greater power output and to avoid the build-up of carbon.

The OHV-design gives also an excellent thermal balance, which contributes to:

  • Reduced cylinder distortion,
  • Improved emissions performance,
  • Deceased oil consumption and
  • Increased engine service life.