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.
  in Jamaica was initially a Spanish colony, but was taken from Spain by England in 1655. and gained independence from the U.K on August 6 1962.amaica is an island nation of the Greater Antilles, 145 miles in length and as much as 50 miles in width. It is situated in the Caribbean Sea, about 90 miles south of eastern â¦ Cuba and west of southern Haiti.