white smoke. not good, for sure. it sounds like water is getting into the CC, with the coolant full, and the engine cold, take the radiator cap off, and start the car, idle it up to about 1000 rpm and check to see if any bubbles are being pushed out the overflow. air bubbles not water swirling. if air bubbles are blowing out the tank. start figuring on a head gasket or even a new head.
replacement motors should not be too hard to find.
John