I wasn't getting a response in the other thread so hopefully I get something here!

So I get a squealing noise around the serpentine belt area when I turn my AC on in 100+ degree weather. I've had the tensioner and belt replaced less than 10k miles ago. It only happens when the fan and AC is on. If the AC is on and the fan isn't on, it won't do it. Just a side note I have a UR stock sized pulley, but I don't think that's the problem.

Here is the video, around 51 seconds I have my fiancee turn the AC off and back on for comparison purposes.


Any ideas?

 

..kinna hard to tell, if you said you've replaced the tentioner/pulley and the serp belt. It could be your alternator?? The reason I said that because I was having the same noise that it only comes on when the AC kicks in, but some times it doesnt make the noise. I left it alone while I was waiting for the tensioner to arrive, but not long after that my alternator failed and once I replace it the noise went away, then the F** tentioner arrived the next day and I didnt even need it...

 

Thanks for the suggestion, I'll take it over to autozone and have them test the alternator this afternoon and report back.

 

The alternator tested fine, back to square one.

 

It can still make noise under load and pass testing

 

I may just have to wait for the thing to die then, I have the extended warranty and I know they won't replace it until it's dead.