GM Family 0 engine

The Family 0 is a family of small inline piston engines developed by Opel, then a subsidiary of General Motors, for entry-level subcompact cars sold as Opels and Vauxhalls. It has a light cast-iron semi-closed deck block with an aluminum cylinder head, chain-driven dual overhead camshafts working four valves per cylinder through roller finger followers, a 78 millimetre bore spacing and fracture-split connecting rods. It debuted in the 1996 Opel Corsa as either a 1.0 litre three-cylinder, Opel's first three-cylinder engine, or a 1.2 litre four-cylinder; a 1.4 litre four joined with the second generation, which began production in November 2002 and added TwinPort twin intake ports. The third generation brought the EcoFlex tuning, and later versions gained variable length intake manifolds and variable valve timing. Opel in Vienna, GM in Bupyeong, Korea, and GM in Flint, Michigan built the engines.