Nissan H engine

The Nissan H series is a family of pushrod overhead valve engines made in inline-four and inline-six versions, an evolution of Nissan's R engine, which was itself based on the 1.5 L, three-main-bearing G engine of the 1960s. The block is iron, with an iron head on early models and an aluminium head on later ones. Versions were used in many Nissan cars and in forklifts well into the 1980s, and a version called the H20II stayed in production until 2003. The SD diesels share the H series bore spacing and basic block layout. The basic H was a 1.9 L engine produced from 1962 for the Cedric.