General Motors Corp. aims to begin production of the engine for the Chevrolet Volt as scheduled in late 2010, but for now it is slowing construction of the plant where the 1.4-L four-cylinder will be built. "The new Flint engine plant is temporarily on hold to conserve cash," GM spokeswoman Sharon Basel said. "We are temporarily suspending purchases of materials, like structural steel, that require heavy outlays of cash. Some nominal work continues that is not cash-intensive." Once cash is in hand, "we can get these engine plants built and running pretty quickly," she added. Also to be built at the $370 million plant is a 1.4-L turbo for the Chevy Cruze.