Okay heres the thing I replaced my altenator today. I replaced the alt. that came with my h22a cause the pulley would make a squealing noise. It drove me mad, so I put the one I had on my h23a1 on it. Now before the idol with the h22a was around 900-1200 at times. But the altenator from the h23a1 the idol dips all the way down to 500-700 rpms.

Now when I had my h23a1 in the car, the idol did the same thing, and I always thought it was the idol itself.

The thing sounds like it is like its actually about to stall out at times. Is this the sign the altenator is going bad?

 

Its possible that the alternator that you put in from the h23 is bad to begin with. Your car might be running off the battery instead of the alternator, which is bad and won't last long. Is your battery light on the dashboard on while driving??

If you can, remove the alternator from the car and get it tested at your local auto store, like autozone. It's free.

 

My JDM H22 and H23 has always idled at ~600 RPM. Sounds fine to me.

 

What about the fact that the lights are diming, and when I step on the gas the lights get brighter.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AndyD &raquo;</TD></TR><TR><TD CLASS="quote">My JDM H22 and H23 has always idled at ~600 RPM. Sounds fine to me.</TD></TR></TABLE>


Nah there is no light.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ludster &raquo;</TD></TR><TR><TD CLASS="quote">Its possible that the alternator that you put in from the h23 is bad to begin with. Your car might be running off the battery instead of the alternator, which is bad and won't last long. Is your battery light on the dashboard on while driving??

If you can, remove the alternator from the car and get it tested at your local auto store, like autozone. It's free.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Acidcrakker &raquo;</TD></TR><TR><TD CLASS="quote">What about the fact that the lights are diming, and when I step on the gas the lights get brighter.
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That's a sign of your alternator or battery going bad. Maybe even a bad connection

 

Im going to say its the Alt. I had the other alt on there and it was fine, idol was a little to high.

Is it a pain to swap the pulleys on the Alts

 

Its not too difficult to remove the pulley. The hard part is keeping the pulley from spinning. I'm actually not sure if the threads are reversed, maybe someone can chime in and correct me

 

Would I be assuming wrong that its the pulley that squeaks and nothing else?

 

usually squeaking means loose belt...

 

True, but that would not be the case. It is in the altenator. I know that for sure. The belt was fine, it was just replaced, and was tight enough. If there are pulley bearings it sounds like they are dry.

 

i know on my 5th gen the pulley was normal threads. Lefty loosey/righty tighty

Also if your good with a DMM check these few voltages.

1. Static Voltage of the battery - a fully charged battery is 12.6 volts
2. Check for AC voltage at the battery in from the alt or on the alternator out to the battery, this will show bad diodes.
3. And if you have an inductive pickup or acess to a VAT you can check the alternator output.
4. Also check battery voltage while running, it should be somewhere around 14 volts

Also check your belt tension and yes like you said make sure the bearings are ok. Check all your connections for cleanliness and tightness.

 

Okay I appreaciate the help, but could someone tell me exactly where the bearings are on the Alt. Ive been staring at a magestic honda diagram for some time trying to pinpoint where the bearings are located.

 

The needle bearing on the input shaft side, there is one inside it in the center.
I'd say either a bad diode trio or the slip rings could stand to be cleaned. Depending on it what it is most people anymore just replace the alternator versus rebuilding theirs. Try cleaning the slip rings on the alternator. Grab your DVOM and put the positive lead on one slip ring, negative lead on the other. You should get a reading (don't know what it should be, sorry) with the leads one way. Now reverse the leads on the slip rings and you should not read anything.
It almost sounds like the capacitor is going bad in it too... Turn your radio on an AM station that you don't pick up, as your engine revs higher does the static noise sound off with it?
I'd check everything you can on it first, try cleaning slip rings and checking other components before replacing it.

 

Hmm well Im thinking about replacing it just for the hell of it. I would swap the pulleys on it, but I dont think that would stop the squeaking.

Any suggestions on ALT companies. Denso FTW, but are there anyother worth wild companies out there.

 

i just go to autozone....lifetime warranty, iirc

are you sure you are getting a good connection?

 

just get autozone to test it. Theres probably nothing wrong with your alternator.

So just so I understand you swapped alternators, but used same pulley and same belt from h22 and it still squeeks??

Use a low hallow tube to your ear and listen to exactly where its comming from. It could even be comming from PS pump or AC pump.

The old h23 alternator could have its bearing all siezed up. You should have checked the bearings in the ac b4 you put it in. While it was out you could rotate the shaft and listen for grinding and squeeking. If its squeeling it could be the belt is too tight or the bearing in alternator. If its squeeking however that could mean belt is slipping meaning its too loose.