S2000 Under The Hood S2000 Technical and Mechanical discussions.

Alternator needs replacement?

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Old 03-31-2006, 11:57 AM
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I usually use the multimeter test, don't know if the fancy Honda machine is the same. I run the car, check the volts, then stop the car check the volts. Whichever is not in range determines the problem, alternator or battery. But it's very strange that the alternator is putting out good voltage but is still the problem. Very weird and uncharacteristic.

But I did learn today that even though a batter might read 12+ volts it still might cause starting problems, as the amps might be too low. So the Cold Crank Amps are bad.
Old 07-01-2007, 01:58 PM
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TTT
Old 07-01-2007, 09:53 PM
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dang old thread back from the dead, you already gave everyone the answer


IF YOU HAVE THIS PROBLEM, REPLACE YOUR ALTERNATOR,
Old 07-01-2007, 10:17 PM
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funny bump.

i suppose i need to replace my alternator.

how do you clean the battery terminals?
Old 07-02-2007, 12:34 AM
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Originally Posted by jyeung528,Jul 1 2007, 10:17 PM
funny bump.

i suppose i need to replace my alternator.

how do you clean the battery terminals?
baking soda(or soda pop) with wire brush if you have strong build up's
Old 07-03-2007, 08:01 AM
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I had the same problem, just want to know the cost of parts and labor to replace the alternator.
Thanks!
Old 07-09-2007, 01:51 PM
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no no no. dont replace the alternator. PM me if youd like, and ill tell you what to replace. save you about 600 bucks. im deciding rather this is public info, or rather i should do some paypal action and help a ton of members save cash.
let me know if you guys think thats a good idea. $850 plus alternator, or just one part to replace just over 100 bucks. and DIY. ill take suggestions. later dave
Old 07-12-2007, 07:37 AM
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There are really only 2 items that can go bad in an alternator... the rotor assembly, which costs $60, and the rectifier assembly, which costs $245. The rest is basically nuts, bolts, bearings, case, etc.
Old 07-16-2007, 05:41 PM
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Originally Posted by MacGyver,Jul 12 2007, 07:37 AM
There are really only 2 items that can go bad in an alternator... the rotor assembly, which costs $60, and the rectifier assembly, which costs $245. The rest is basically nuts, bolts, bearings, case, etc.
it seems like replacing either one or the other, or both would fix the problem.

any leads on how to replace these parts within the alternator?
Old 07-17-2007, 04:13 AM
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Unless the lacquer has failed and there's a short (or a wire has broken and you have an open), the rectifier is the most likely piece to fail (being solid state).

Open up the alternator and swap out the parts. It's not like we can give you a blow by blow account on how to open one up, just grab a service manual to see an exploded view, or just start disassembling.


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