Before I go ape with my WD-40 spraycan, can anyone tell me why I have about 15 budgies screeching in the approximate zone of the belt driving the alt, AC comp, fan etc.? I don't want to offend any bird lovers, but I would really appreciate some insight into this little annoyance.

The budgies are quiet at cold engine start up, but become active as the engine warms up, and remains a constant whistling high-pitched chirp until engine switch-off. Volume, pitch and intensity seem to be independent of engine revs.

What's the fix? Anyone for grilled budgie?

 

Not sure what a budgie is, but sounds like one of either your tensioner pulley, idler pulley or even alternator - something is worn or beginning to seize up. If it's defnitely not your belt, take it off and check everything for play or if it's seizing.
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DO NOT use any type of spray to try and quiet your noises. Your truck is telling you something, like you have either a belt, a belt tensioner, idler pulleys. a/c or alyernator bearing, whatever you need to fix it before it fails on you.

 

X3 Take you belt off and spin every pulley to see if one squeaks.

 

Good advice- thank you. Gotta stop the screeching...

Budgie is a small parrot-like bird that when caught up in the fanbelt, screeches very loudly. Even the tourists turn around to listen... If it's not a budgie, it's a problem..

 

Does it happen with the vehicle parked or only while driving?

 

The noise you are referring to is either your alternator getting ready to sieze or your A/C compressor. You can follow the information in the early thread about removing your belt and turning the pulleys by hand. You will either hear the noise or the pulley will be very difficult to turn.

 

None of the above. Everything still almost new (truck's only got 40k miles on the clock). I think it's marl dust in the belt idler pulley and the alternator, because a little silicone fixed the problem. I will watch the alternator bearing carefully, as this marl dust can be a problem here.

Thanks all!