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RX8MAN04 02-16-2009 01:20 PM

battery over charging???? help
 
hi.. does anyone know how many volts our alternator puts out during idle. mine was 14.25

Huey52 02-16-2009 01:44 PM

That's about right. Although a 12V system, alternators typically put out more volts to account for electrical latencies and 'battery inertia.' 14v range is appropriate.

RX8MAN04 02-16-2009 01:53 PM

thanks huey... autozone said i was cooking my battery at that rate.
chuck

Huey52 02-16-2009 01:59 PM

13.5v - 14.5v is within RX-8 alternator spec's (edit: 15v is the upper limit per shop manual).

nycgps 02-16-2009 05:52 PM

*shurgs*

Whoever told ya that, please do us all a favor, report him to the store manager cuz he is misleading all customers.

Mazurfer 02-16-2009 05:58 PM

Please do tell the manager! :uh::tool:

9krpmrx8 02-16-2009 11:23 PM

Yeah my alternator was overcharging my battery resulting in a few thousand dollars of damage. You will know when its being overcharged, the acid come out like mine did.

nycgps 02-16-2009 11:44 PM

Alternator overcharging CAN happen. but the problem here is that those people ---- who the @!@#*)!@# ever that works in that Autozone ... if he doesnt know anything about "that" Alternator, he shouldn't give his 0.02 at all. know what I mean ? 14.25 is perfectly fine.

Report his ass to the manager or something. Not like anything Gonna happen I think. but I think u can just walk back to that Autozone and make a scene outa it so all other customers know wtf is going on.

9krpmrx8 02-17-2009 11:51 AM

Yeah, but if you believe what guys at Autozone tell you then you need to be slapped anyway.

nycgps 02-17-2009 11:58 AM

There was a time I forgot what my fog light size was when I was in Autozone and I asked those ppl ... DONT SLAP ME ! :(

ken-x8 02-17-2009 04:44 PM


Originally Posted by 9krpmrx8 (Post 2870808)
Yeah my alternator was overcharging my battery resulting in a few thousand dollars of damage. You will know when its being overcharged, the acid come out like mine did.

Yikes! Sounds brutal.

I once had an overcharged battery that kind of exploded. All it did was blow the caps off the filler holes and smolder. Got a nice puff of smoke coming out around the hood. When I popped the hood for a look, the caps were gone and the case was bulged outward.

After putting in a new battery, I checked the charging system. I think it was around 16 volts. Put in a new regulator.

It was on my wife's old AMC Hornet, so if there was any damage to the car there was no way to tell.

Ken

Nubo 02-17-2009 06:14 PM


Originally Posted by ken-x8 (Post 2872071)
It was on my wife's old AMC Hornet, so if there was any damage to the car there was no way to tell.


:lol:

Mazurfer 02-17-2009 06:17 PM

It doesn't take too long to figure out who at the Autozone(or any other store) knows what the hell they are talking about and who doesn't.

I've actually got a really good guy at mine. He's proved himself to me........even though I still take it all for what it's worth. I will trust him more than most....albeit, I haven't had to use him for anything related to my 8.

alnielsen 02-17-2009 06:21 PM


Originally Posted by 9krpmrx8 (Post 2870808)
Yeah my alternator was overcharging my battery resulting in a few thousand dollars of damage. You will know when its being overcharged, the acid come out like mine did.

My wife's Ford Fiesta did that once. Driving down the road it smelled like tomatoes. I was more fortunate. The damage was just the alternator and the battery.


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