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Going through Alternators like nothing

Old 12-05-18, 04:16 PM
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Going through Alternators like nothing

So this all started about 5 months ago when my alternator went out and so I got a new one through the warranty and ever since then Iíve gone through about 8 alternators. I tried changing the plug that connects to the alternator which helped but as you can tell it took a **** on me yet again.... any ideas on what it could be? Also when I put my key in the ignition from off to on the rpm needle kinda moves alittle (like its getting a surge of energy) and it never did that before. Anways please comment ideas on what it might be....
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Old 12-05-18, 04:49 PM
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Did you put a series 5 alternator on a series 4 or vice versa?

They require a different wiring scheme and if you retrofit without wiring modifications it will kill alternators as you described.
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Old 12-06-18, 12:17 PM
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Where did you get these alternators from?
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Old 12-06-18, 01:39 PM
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Rebuilt alternators can be hit-or-miss depending on who rebuilds them. Other than that, there are a few preventive measures to take to ensure that a new/rebuilt alternator has a fair chance at surviving:

1. If the battery is just plain worn out (eg. 4+ years old), and if it's voltage (engine off, measured at battery posts) is less than 12.4V, get a new one. ANY alternator would work a bit harder to keep a battery in that state charged, hence shorter alternator life.

2. Need to have clean & un-corroded battery terminals and wiring. That includes the B+ power cable to the alternator, and all power & ground cables to the starter, engine block/chassis. ANY alternator will fail prematurely if it's fighting lots of electrical resistance due to poor connections trying to keep a battery charged.
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Old 12-06-18, 03:08 PM
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Originally Posted by KYPREO View Post
Did you put a series 5 alternator on a series 4 or vice versa?

They require a different wiring scheme and if you retrofit without wiring modifications it will kill alternators as you described.
no S5 ALT on S5 RX7
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Old 12-06-18, 03:09 PM
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Originally Posted by DaBrkddy View Post
Where did you get these alternators from?
Autozone/// thinking I should buy OEM?
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Old 12-06-18, 03:12 PM
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Originally Posted by Pete_89T2 View Post
Rebuilt alternators can be hit-or-miss depending on who rebuilds them. Other than that, there are a few preventive measures to take to ensure that a new/rebuilt alternator has a fair chance at surviving:

1. If the battery is just plain worn out (eg. 4+ years old), and if it's voltage (engine off, measured at battery posts) is less than 12.4V, get a new one. ANY alternator would work a bit harder to keep a battery in that state charged, hence shorter alternator life.

2. Need to have clean & un-corroded battery terminals and wiring. That includes the B+ power cable to the alternator, and all power & ground cables to the starter, engine block/chassis. ANY alternator will fail prematurely if it's fighting lots of electrical resistance due to poor connections trying to keep a battery charged.
makes sense, I will clean connections with a wire brush before installing new ALT. (I just bought a new battery last week)
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Old 12-07-18, 02:41 AM
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Originally Posted by rotary forever 77 View Post

Autozone/// thinking I should buy OEM?
It took 3 on my buddies civic coupe to get one that would last more than a few hundred miles at a time.
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Old 12-10-18, 06:59 AM
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I would recommend NAPA.
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