One Serpentine Belt
7
And your question is,,,,,,,,,,,,,,,,,
Check the belts - they're probably loose or worn.
The 2011 Ford Expedition has 24 valves.
The 2003 Ford Expedition has 16 valves.
The 2004 Ford Expedition has 16 valves.
The 2008 Ford Expedition has 24 valves.
The 2007 Ford Expedition has 24 valves.
The 2002 Ford Expedition has 16 valves.
The 2006 Ford Expedition has 24 valves.
The 2014 Ford Expedition has 24 valves.
The 2010 Ford Expedition has 24 valves.