I had the same problem after replacing the V-belt with aftermarket gator belt.
The problem turned out to be that the replacement belt that I used was a gator belt and not V type. Once I switched back to V belt, returned to normal. no noise... no sqeeeeeak....
Even though the belts looked similar and I was assured that the gator was superior, it does not have the same traction of the V. I tried everything with the gator.... tightening, spraying with dressing, and nothing resolved the problem until I changed back to V.
Its probably just the belt is a tad loose, since when the belt is old it get worn/stretched, and can slip when the engine is running, causeing a whining noise, to fix this the easiest thing to do is tighten the belt. you can tighten the belt by loosening up one of the belt pulleys, there shouls be one that is on a slider and you can adjust it with a socket or wrench
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Oct 2, 2013 - I recently had new fan belts installed after hearing a high-pitched, ... Do you hear the noise when the engine is running and the vehicle ... Just replaced water pump (and timing belt) yesterday and squeal ... When driving it make a noise but change out and caught speed the noise is coming from driver side.Missing: 1999 plymouth breeze
Remove the drive belt to the ac compressor and spin the pulley by hand .If it feels rough or can be moved sideways then replace the bearing in the pulley (it can be separated from the compressor with out opening up the system)
readjust the fan belt and check the condition of the pulleys The secondary air injector is showing a malfunction ---causes are ---wiring---AIR valve--- AIR sensor--- ECMI would be checking the wiring and connections as they may not have been replaced properly after the timing belt work. Replace with genuine units only as some after mark units are not compatible with the cpu.
sounds like your belt got some oil on it try cleaning it off with some water and see if this works if not i would buy a new belt and put/have it put on and see if this works, last thing to check is the idler pulley this will some times make the noise
Just a thought- remove the oil filler cap when the whine is present - (this checks if PCV valve is faulty, causing high crankcase vacuum, which in turn causes a whistling/whine noise as air leaks past engine oil seals). Worth a check.
Try listening with a short piece of hose pipe to locate immediate area/source of noise.
This NoiseDescription sounds Indicative of the Sounds that come from the Serpentine Belt Or Related parts such as Belt Idler Pulley or Belt Tentioner witch also has a Pulley, but if Tensioner itself is Literally BROKE I've replaced a number like this it will cause a Whining noise . Best case scenario its just the Belt, and if any of the other Problems turn out to be the Culprit the Belt MUST be Replaced Anyhow as Damage is Being caused By the Very Whining you hear.
PLEASE Spend the Extras $ for the BEST BELT as this Drives your Water pump, Alternator, A/C Compressor, Power Steering Pump All Crucial to Control of, easy Steering ,All Electrical-Power Distribution, The COOLING of Engine << VERY CRITICAL Component
The Pulleys usually have a more Hum type Whining. So I would say at Best The BELT , And WORST Belt Tentioner is Broke