weird..high pitched noise

[XxHybridx]

alright, so a 2 days ago my car started making this high pitched noise.
almost sounds like a semi truck.
so i figured the alternator was going bad. my lights would go bright whenever i revved my car etc..
at first it wasn't to bad, it would only get really loud when i got to the higher rpms.
then it started doing it right when i would turn on the car. would do it for a few seconds then just go down, but continue to do it at high speeds.

so i went and switched out the alternator(the pulley on the old one seemed to be super loose)

started up fine and everything..but when i drove away the noise comes back at around 2500, the same semi truck sound noise i was mention, then at about 3500, it gets really high pitched. i dunno wtf it is..thought it was the alternator for sure. its quite aggravating. :rant2:

could it be one of the pulleys or anything?
thanks in advanced

[XxHybridx]

someone said the timing belt might be screwed up.

[Schassis707]

HMMM What is this timing belt you speak of??

[Sileighty_85]

someone said the timing belt might be screwed up.

dont listen to that retard

Post Video

[CrimsonRockett]

Have you inspected your belts?

My dad's old Nissan Pickup used to do this. It was caused by old/worn belts.

Swap them out. They're cheap and easy to replace. That should fix your problem.

[XxHybridx]

ill try to get a video of the sound. hopefully u guys can make the sound out, cause it gets really at 3500 rpms, so hopefully the high pitched sound doesnt get too drowned out.

i actually only inspected the alternator belt, and it looked in pretty good condition still. didnt inspect the other belts tho. i figured the alternator belt was the one being lame, since changing the alternator somewhat helped out with the problem.
ill check em tho.

[XxHybridx]

alright. super late, i know. but i finally changed the belts. the noise would end up going away sometimes and then it would come back -.-;
so now, the car sounds a lot better.
i had gotten to a point where the car would make the high pitched noise when i would start the car on cold days. i would rev it a couple of times to make it go away.

so i changed all the belts, and the car stopped making the sound.
only prob is that it would make it when i would rev the car to 4500(was testing it)
so we tightened up the belts a little bit cus we left one a little loose, and now it makes the noise at 3000 rpms.
do i just gotta mess with the belts and find the right tension to tighten them at or what?

thanks in advanced

(oh yeah, when i removed the belts, one of em looked really worn down)

[Mike666]

Look at this video, if this is the problem, replace clucth fan. and DONE!



YouTube - KA screach noise (http://www.youtube.com/watch?v=mvJWLx5Kfv0)

[XxHybridx]

holy hell dude. thanks lol.
my car sounds JUST like that. like, identical lol. ill replace the fan asap.

[Mike666]

Sure bro, just make sure to change the clutch inside the fan. let me know if it did it for you.

[essthirteeeen42]

My car makes that noise when I start it up in the morning, but it goes away as soon as I have turned it on, and the thing is I have dual electric fans?

[RyanS13]

My car makes that noise when I start it up in the morning, but it goes away as soon as I have turned it on, and the thing is I have dual electric fans?

You bumped a thread that was a over a year ago to say that?

Here: Let me google that for you (http://bit.ly/HVYWp0)

How hard was that?