Just changed my alternator but something is weird

[mark01070]

Hi guys I just changed my alternator I thought that was the only problem.....weird thing happened I jumped my car and the car was running but the alternator was making a loud noise...is that normal when you install a new alternator....2nd....I unhooked the jumpers from my dads car and my car was still running......then I unhooked the negative from my battery still running ..then I unhooked the + positive and my car shut off....Do you guys think I need a new battery also with the alternatoe I just got ...and I dont know why my alternator is sooo loud..any help I would apprecite it...thanx

[Viper_Storm]

you might have gotten a brand new bad alternator

[mark01070]

Originally Posted by Viper_Storm

you might have gotten a brand new bad alternator

Yeah maybe I thought it might be a short maybe Ishould unhook the battery feed to the alternator and check to see if I tightened it enough..I dont know

[wrightz28]

You should have recharged your battery before installing the new alternator.

[89IROC&RS]

the noise means your regulator is screaming, the alternator is fine, but you have another wiring problem. check your battery cables for corrosion damage, weak grounds, and all that. and charge your battery.

[philly rs]

i was thinking bad altornator too, and if u get a new one u might as well get a new battery too saves alot of autozone trips

[ct91rs]

Is the belt slipping? Could be a bad bearing, but not very likely. Maybe the regulator like 89 said. Once the car is running, you can disconnect the battery, and it should not die, unless you're not getting power from the alternator. Charge the battery, a dead battery will strain you're alternator.

[mark01070]

Originally Posted by ct91rs

Is the belt slipping? Could be a bad bearing, but not very likely. Maybe the regulator like 89 said. Once the car is running, you can disconnect the battery, and it should not die, unless you're not getting power from the alternator. Charge the battery, a dead battery will strain you're alternator.

Thanx guys I will let you know how it goes

[mark01070]

Originally Posted by mark01070

Thanx guys I will let you know how it goes

Hey guys I think I may have found out what the loud noise coming from my alternator was...I found that the fan of the alternator was rubbing up against the metal base of the alternator....Well I have to wait an hour for my battery to be charged beats buying a new one....If I have any problems or you htink the fan rubbing up aginast the alternator was the cause for the loud noise I would appreciate some feedback...I checked the serpentine drive belt that looks fine...All I did was take a wrench and move back each fan blade so it would not touch the alternator hopefully this will work....

[Viper_Storm]

lol, good idea, let us know it turned out.

[89IROC&RS]

didnt think of that one..... hope that fixed it.

[wrightz28]

Originally Posted by Viper_Storm

lol, good idea, let us know it turned out.

ehhh,

BAD IDEA! Those blades turn an extreemely high rpm and see some stress. Would be none different then trying to "straighten" a belt driven cooling fan, you're taking a gamble.

[mark01070]

yeah I readgusted the fans on the alternator just a little bit no more sound...prrrrrs. like a kitten....I drove my car around for an hour and all was good.....?...I just bought a new battery because my old one was no good....right now when I turn it on it is in the top of the beginning of the red lines for battery power....could this mean that the alternator is not working..I mean its brand new....does it take time for the battery to build up...I mean its new I would not think so ...It was running for over an hour and I didn't see any power drop in the battery but it stayed in the red.....I don't know I think Im gonna take it to a shop so they can run a diagnostic test......anybody got any ideas...how much does a diagnostic test cost anyways..

[88camaroproject]

just got one for engine and tras 86 bucks, lots of oil leakes for me

[Rally Sport]

Out of one problem and into another, huh?