Whirring Sounds Coming From Under the engine
Symptom: Whirring from the engine that gets worse as engine speed increases. Any noise that increases or decreases with engine rpm.
1. Low power steering fluid.
The Fix: Check and fill power steering fluid.
2. The alternator bearings are bad.
The Fix: Replace alternator.
3. A bad water pump.
The Fix: Replace water pump.
4. Bad power steering pump.
The Fix: Replace power steering pump.
5. A bad air conditioning compressor.
The Fix: Replace air conditioning compressor. (Not a DIY job)