The engine features a five-bearing forged steel crankshaft, strengthened connecting rods, redesigned pistons, piston oil cooling jets, reprofiled camshafts and an integrated oil cooler.
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LK9 is a turbocharged 2.0 L (1,998 cc) version of the L850 (86 mm bore) series Ecotec utilizing an all-new reinforced sand cast aluminum cylinder head and upgraded internal components. This engine is also known as B207 when used by Saab and Z20NET by Opel for use in the Vectra C and Signum. The current Ecotec line is manufactured in Tonawanda, New York. The first engine in the Ecotec Gen I line-up was Ecotec 2.2 L61, introduced in May 1999. Vibration is reduced with twin balance shafts. The engine uses aluminium pistons and cast iron cylinder liners. Much of the development work on this project was carried out by Lotus Engineering, Hethel, United Kingdom. Development began in 1994, by an international team of engineers and technicians from Opel's International Technical Development Center in Rüsselsheim, Germany, GM Powertrain in Pontiac, Michigan, and Saab in Södertälje, Sweden. The Ecotec engine is a DOHC 4-valve design with a lost foam cast aluminum block and head (L850 for 86 mm bore applications, and L880 for 88 mm bore ), designed for displacements from 1.8 to 2.4 L. GM intended this new Ecotec to become its global 4-cylinder, and it has already fully replaced their OHV I4 line. The name was already used for the Opel GM Family II engine, Family 1 and Family 0 ranges. The ' Ecotec' name was adopted in 1994 for the new generation of Family II engines (2000 in North America).
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