Noise during starting

Ford F-150 2011 Starter 65000 miles
Our F150 Eco Boost has started making a wierd noise when we start up the engine...it starts and runs BUT is making a shreeel noise. What would this indicate?
Tracker from United States 8 years ago  
TR
4 reports 
Inkman66 from Canada 6 years ago
Probably either a loose belt or the belt tensioner needs replacing. Could also be a failing bearing in the alternator, which would ‘squeel’ When under load, such as first starting.
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