Rattling Pony and F-150

Some 2011 Ford F-150 and 2011-2012 Mustang vehicles (excluding Boss) built on or before 3-31-2011 and equipped with the 5.0L engine may exhibit an intermittent metallic rattle or scratching type noise in the area at the front of the left hand cylinder at idle with the engine at operating temperature. This noise is not a typical upper engine tick or tapping noise.
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