An engine with a fan belt.
fan belt definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a tough, thin belt on most automotive engines connecting the crankshaft to the cooling fan, alternator, etc.
fan belt definition by American Heritage Dictionary
A taut rubber belt that transfers torque from the crankshaft to the shaft of the cooling fan on an engine.