This sounds like the AOS - air oil separator.
A whistling noise indicates a vacuum leak.
There are many causes of such whistling noise coming from a motor. These includes but are not limited to:A broken brusher rubbing against the commutator.Loose bearingsA damaged armature winding rubbing against the field windings.
A chirping whistling noise!
A bad compressor belt can cause a whistling noise while running the air conditioner. A bad engine can also cause this noise.
whistling noise from engine will be caused by a leaky gasket,sucking air. this is usually the intake manifold gasket
The noise is caused from lime and rust build up inside the shower head. Soak it for 24 hours in CLR - that should work.
Vuvuzela and police whistling noise of loudspeakers and people
dog whistling
The most common cause of the whistling in a 2003 Impala is a vacuum leak. Any of the lines under the hood could be causing the noise.
it could be the idler puller rubbing on the bearings. we had to replace it on our 2006 Chevy trailblazer ext.
whistling loud noise
* If it is stiff and making a crunching noise when going into gear it means the syncromesh (which is the cogs between gear cogs are worn), If it is making a whining noise in first gear it's a flywheel in the clutch, if it makes a whistling noise while travelling the clutch needs replacing, failing all that the gearbox needs grease or your elbow does.