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 Alternator Noise (mechanical failure)

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Sir Psycho Sexy
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptySun Jun 16, 2013 1:22 pm

You could also take it as a mod opportunity and get a 220 amp alternator if you plan on doing any audio stuff later on.
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98riv
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptySun Jun 16, 2013 9:36 pm

Which parts aren't replaced on the partial rebuild?  Also how many volts should a good alternator put out?

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptySun Jun 16, 2013 9:53 pm

A rep at NAPA told me they sell remans at two price points. The lower price is for a cleaned-up unit with refurbished rectifier diodes and brushes, but the mechanicals aren't touched. The higher price point ($50-75 more) includes a new bearing in addition to the electricals, a full rebuild.

Cores with bad bearings get fully rebuilt. Cores with only bad diodes will likely be partially rebuilt.

Either the same source or possibly an AutoZone rep told me that 1 in 4 of the alternators they sell come back defective. This actually happened to me once. Brand "new" alternator put out incorrect voltage, really confused me for about 15 mins.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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98riv
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptySun Jun 16, 2013 9:57 pm

I bought the cheaper AC Delco one (didn't know it was a partial rebuild), but it looks brand new on the outside.  I'll have to check the information that came with it and see what it says.

EDIT: I just checked the box and it doesn't mention if the bearing have been replaced or not.  The book also said it should produce 13.5 - 15.1 volts.

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptySun Jun 16, 2013 10:11 pm

Wouldn't hurt to ask the vendor you purchased from. You might call in as a customer interested in buying an alternator, not someone who's already purchased one, if you know what I mean.

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyMon Jun 17, 2013 1:02 am

highwaywarrior....NAPA has a 150A Alternator for the Riv. If I remember correctly it's like $150 or so. Runs my 2500 watts just fine smile
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyMon Jun 17, 2013 9:11 am

@98 Riv: In my experience the ACDelco remans are superb.  IDK if they are still doing this BUT what I was told they did was they took an "obsolete" manufacturing line and set it up to remanufacture alternators.  They make the remans out of a mix of new and used parts that meet new specs.  Old alt cores that come in are broken down and scavenged.  The cases are checked and almost always reused.  IIRC the bearings are always new, the brushes always new, and  the electricals (diode pack) usually new but definitely meeting new specs.  They are then 100% tested to spec.  The only problem I've had with one is I got one from gmpartsdirect.com that had been dropped on the pulley, damaging the pulley.  I popped the pulley off the old one and sent them the old core back with a "here's the pulley you all sent me" note...  As such that reman is still on my Riv, been there for years.  It has lasted longer than the one that came new on the car and also longer than the NAPA reman that went before it.  I guess it is fair to say you should get your money out of the ACDelco reman.
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyMon Jun 17, 2013 7:21 pm

albertj wrote:
@98 Riv: In my experience the ACDelco remans are superb.  IDK if they are still doing this BUT what I was told they did was they took an "obsolete" manufacturing line and set it up to remanufacture alternators.  They make the remans out of a mix of new and used parts that meet new specs.  Old alt cores that come in are broken down and scavenged.  The cases are checked and almost always reused.  IIRC the bearings are always new, the brushes always new, and  the electricals (diode pack) usually new but definitely meeting new specs.  They are then 100% tested to spec.  The only problem I've had with one is I got one from gmpartsdirect.com that had been dropped on the pulley, damaging the pulley.  I popped the pulley off the old one and sent them the old core back with a "here's the pulley you all sent me" note...  As such that reman is still on my Riv, been there for years.  It has lasted longer than the one that came new on the car and also longer than the NAPA reman that went before it.  I guess it is fair to say you should get your money out of the ACDelco reman.

Thanks

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyMon Jun 17, 2013 10:38 pm

98riv wrote:


albertj wrote:
@98 Riv: In my experience the ACDelco remans are superb.  IDK if they are still doing this BUT what I was told they did was they took an "obsolete" manufacturing line and set it up to remanufacture alternators.  They make the remans out of a mix of new and used parts that meet new specs.  Old alt cores that come in are broken down and scavenged.  The cases are checked and almost always reused.  IIRC the bearings are always new, the brushes always new, and  the electricals (diode pack) usually new but definitely meeting new specs.  They are then 100% tested to spec.  The only problem I've had with one is I got one from gmpartsdirect.com that had been dropped on the pulley, damaging the pulley.  I popped the pulley off the old one and sent them the old core back with a "here's the pulley you all sent me" note...  As such that reman is still on my Riv, been there for years.  It has lasted longer than the one that came new on the car and also longer than the NAPA reman that went before it.  I guess it is fair to say you should get your money out of the ACDelco reman.



Thanks
...also for the rest of you reading this, a junkyard alternator is usually a pretty good bet.  People do not usually junk their cars over alternators.
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PostSubject: help!   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 4:00 pm

there is a noise coming from my engine, when i press the gas there is a whirring noise from engine and when i let off it makes the same noise, thought it was the supercharger so i took the belt off and ran it, same noise!!! someone call or text me @ 7 5 7 6321746 so i can either send you the vid to hear it or listen to it from the phone. Daryl
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 4:11 pm

Did you replace the alternator yet?

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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highwaywarrior
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 4:16 pm

Yes I did already. Seems to be coming from inside the engine. Idk what to do.

ok i got braveand ran the car for a bit without accessory belt and guess what, i didnt hear the noise anymore
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 5:03 pm

Idler pulley? Tensioner pulley? It's EXTREMELY COMMON for those to frag. Start spinning them by hand and see if any of them feel nasty.
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highwaywarrior
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 5:30 pm

Car doesnt make the noise with accessory belt off, put it back on and it makes the noise, which leads me to believe that its either the waterpump or powersteering pump, I spun waterpump and powersteering pump, powersteering pump doesnt spin as freely as the waterpump, in fsct when I try to whirl it fast it hardly stays spinning.mive already changed alternater and tensioner pulley. Oddly powersteeringnpump doesnt make that other noise that im use to hearing usually on some fords, when powersteering pump is going lol
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 5:31 pm

Ah...you said ACCESSORY belt lol.
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 5:34 pm

Yeah lol. Any ideas
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 7:43 pm

I figured it out, would you believe that that noise is coming from the rebuilt alternator?!
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 7:54 pm

I would! Did you buy the higher price rebuild?

_________________
'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch

^^^ SOLD ^^^ frown

'05 GTO • 85k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun


'70 Olds Ninety-Eight Holiday Coupe • 116k miles • 455 Rocket V8
Because cool


'95 Celica • 152k miles • 0-60: yes
Because free
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http://www.cardomain.com/ride/657082/4
highwaywarrior
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Jun 19, 2013 8:01 pm

I did not, I ended up purchasing before I read the part about higher price rebuild. Good thing theres a year warrantee, ugh. Its not a terrible noise but my alternator sounded way worse lol
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Sir Psycho Sexy
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Mar 12, 2014 11:37 am

I tracked down my squeaking. The alternator is the only thing that squeaks when spun by hand. It doesn't track funny, and it still charges everything fine.

Is this a telltale sign that it's on its way out?
Is there anything I can do to stop the squeak?
Is a $60 rebuild a good idea?
I don't really want to replace it if possible because it's a 220 amp unit.
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PostSubject: Re: Alternator Noise (mechanical failure)   Alternator Noise (mechanical failure) - Page 2 EmptyWed Mar 12, 2014 12:57 pm

I've seen squeaking alternators last many years and many thousands of miles. At some point it will fail, but you may want to wait until it fails, if you can stand the squeak.

Yes, the squeaking means something is wrong, and yes something IS wrong, but when you decide to tackle it is up to you.
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