A core is your old worn out (yet still rebuildable) engine or part that is required as a trade in when you purchase a remanufactured or sometimes a new one. An acceptable core or rebuildable core is one that is not broken, damaged beyond repair, or so severely cracked that is can no longer be machined back to proper working condition.
Jamaica is part of the continent of North America. North America includes Canada, the United States, Mexico, and the islands of the Caribbean Sea.
Jamaica is an island country situated in the Caribbean Sea, comprising the third-largest island of the Greater Antilles. The island, 10,990 square kilometres in area, lies about 145 kilometres south of Cuba, and 191 kilometres west of Hispaniola, the island containing the nation-states of Haiti and the Dominican Republic.