With its serial number beginning with an S, this variation of the engine is characterized by having its thermostat directly mounted on top of its cylinder head. It’s fair to claim that the Nissan Forklift H20 is considered as Nissan’s oldest variation of its forklift engine selections. Here are some of the essential information people may want to learn about the powerful specs of the Nissan Forklift H20 engine. The engine still gets high respect and credibility mainly because it is made by one of the leading forklift engine manufacturers in the industry today, Nissan.