1992 Acura Legend LS coupe is overheating but the heator is not blowing hot there is a little smoke out the tailpipe only when the temperature has gone beyond the normal range?

Most likely your thermostat has gone bad. Cheap and easy repair. If its white smoke coming out the pipe it may be a head gasket,,the smoke is acutally steam vaporating out the chamber thru the tailpipe...if it starts a second then stops you may have just gotten away from a going bad engine and itsw the thermostat..have it checked..