General Motors is investing $163.2 million three plants as it prepares to ramp up engine production for the Chevrolet Volt, Cruze and a new small Chevrolet. The company’s Flint Engine Operations will take home the lion’s share of the money, with $138.3 million going to help boost production of the Ecotec turbocharged 1.4-liter four-cylinder engine used in each of the company’s fuel-thrifty cars. @funkmasterflex