Jerhemy1331
Not really sure how to best post videos on here so i am just putting several links in here, all the same vid.

[URL=http://s1129.photobucket.com/albums/m518/Jerhemy1331/?action=view¤t=VIDEO0011.mp4]



http://s1129.photobucket.com/albums/m518/Jerhemy1331/?action=view¤t=VIDEO0011.mp4

I was driving today and I noticed that at about 5k rpms i would hear this very intense clicking/whinning. I gave it full gas off a stop light and when it hit about 6k rpms the noise got real bad and never went away, even as my rpms returned to ~600 rpms. I know that alternator whine can happen when it is going bad or there is extreme loads on it, but nothing is even hooked up yet in my car so it should have just been charging the batt. I stopped at the closes auto shop and they def agreed that the noise was from the alt, and it was emitting a lot of heat. Took it to an alternator specialist here in town and he just watched the voltage on the batt and it wasn't going down so he figured it was still charging at least a bit. The batt was sitting at about 13.78 while the car was on. the serious clicking noise in the video did go away for a few min and then came back when I got about 3k to 4k rpms and stayed on at lower rpms again.

I'm really stumped on this and the auto shop/alternator guys didn't seem to know anything about it.

If the vids don't work, or you need more info please let me know and I can do my best.

Thanks for any info on this!!
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Jerhemy1331
http://s1129.photobucket.com/albums/m518/Jerhemy1331/?action=view¤t=VIDEO0011.mp4

This vid works for sure.

Thanks again
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warlord
Have you checked your belt tightness and are the alternator bolts all tight.
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Jerhemy1331
Yep I checked all wires and bolts, as well as the belt. I have had it installed and running fine for a few weeks now and then all of a sudden this started. I am pretty sure it is the bearing about to go out. I am taking my car in to another shop today to see what they think.
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warlord
Any good news?
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Jerhemy1331
not sure why my last post didn't stick... but yes I took it to a shop that agreed it was most likely a bearing, so i'm going to pull the alt out this week and try to get a new bearing installed on friday, for 40$ so that's not bad.
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AmmoJammo
you may have stuffed the bearings from over tightening the belt, so just be aware of that when you get it fixed
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Jerhemy1331
AmmoJammo wrote:
you may have stuffed the bearings from over tightening the belt, so just be aware of that when you get it fixed



Hmm i had never thought of this before. I had the new alt installed by a local auto shop and they said they didn't have to put a smaller belt on, even though the alt pulley wheel is smaller than the stock alt, so I wouldn't think that it would be any tighter than the original stock setup. I'm not an expert on how the belt tensioner works though soI will have them take notice of that when i'm getting the bearings installed.
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AmmoJammo
If its a spring loaded tensioner, it shouldn't be an issue

I would have thought you'd need a shorter belt if the pulley was smaller, even a 10mm shorter belt makes a lot of difference.
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Jerhemy1331
Yes I thought the same thing, that smaller belt would be needed because it is a 1 inch pulley vs the 2 inch that was on the stock alt. I am 99% sure I have an automatic tensioner in my car. I will be pulling the alt and getting the new bearings put in this wknd, I will let update this thread once 've got it done, and pics if there are any worth sharing haha.
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