2.4 173,000 MILES

1999 Nissan Altima

Several days ago I started hearing a whining noise coming from the engine when I start the car, and the noise continues while driving. None of the dash indicator lights have come on. What could this noise be caused by, and is it a precursor to a potential problem?
April 11, 2007.

Timing belt when was it last changed? Could be it. Or power steering pump/AC compressor/Alternator.

Apr 11, 2007.