I would examine motor first for metal flakes,probably oil filter.Whine can change because of loss of vacuum with oil cap off.Use a sethescope to pin point problem or long screw driver held to ear.Whine can come from alternator bear,pulleys,and acessories

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt