 GM Family II engine

The Family II is a straight-4 piston engine that was originally developed by Opel in the 1970s, debuting in 1979.Available in a wide range of cubic capacities ranging from 1598 to 2405cc, it simultaneously replaced the Opel OHV, Opel CIH and Vauxhall Slant-4 engines, and was GM Europe's core powerplant design for much of the 1980s.