IL-Auto industry supplier Metaldyne has revealed a plan to close its 130,000-square-foot plant at 6119 W. Howard St. in March. The aluminum die casting operation plant employs 188. The employees, facing layoff, produce valve bodies, clutch housing, and stators for customers including Ford, General Motors and DaimlerChrysler. The company put the property on the market in July and has yet to find a taker.…