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Unread 07-22-2013, 03:01 AM   #1
SteveSpahr2345
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Jeep XJ Generator Charging Question

Okay on my 96 XJ my new remanufactured alternator works fine in the heat (during the day). Proper Voltage and some what of a bearing squeak. But at night battery voltage is low. the alternator squeals loud at startup and when i get close to 2000 RPMs. Also once in a while the Gen light flashes on and off with electrical noises from the PCM and the relay box and a temporary no start.

Any suggestions what to do would be great because i'm looking to swap a mean Green alternator in the XJ and call it lol

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Unread 07-22-2013, 11:03 AM   #2
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Unread 07-22-2013, 12:17 PM   #3
CJ7-Tim
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Depending on where the squeak is from, either the fan belt is too loose, or your rebuilt alternator is defective.
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Unread 07-22-2013, 05:20 PM   #4
SteveSpahr2345
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I took the belt off and turned my pulleys the alternator makes a sqeak like a mouse! Time to buy a mean green or powermaster and call it lol
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Unread 07-22-2013, 06:20 PM   #5
Holder350
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Why pay for a mean green when its no different than a new stock alt?
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Unread 07-22-2013, 07:12 PM   #6
SteveSpahr2345
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They charge much better plus the bearing more robust. They can handle high heat and pressure. Plus they damage wallet pretty good
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Unread 07-22-2013, 07:23 PM   #7
Holder350
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OK.....I'll stick with OEM. They lasted 15 years, and work just fine.
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95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
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You can tell the character of a person in how they treat someone who can do nothing for them.
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Unread 07-23-2013, 03:37 PM   #8
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Why pay for a mean green when its no different than a new stock alt?
Usually mean green alt put out way more amps the stock 96 amp alt,or go its a grand Cherokee alt they put out somewhere around 130 amps.
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Unread 07-23-2013, 04:07 PM   #9
Holder350
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No they won't, the only way to get more amps from an alternator is to increase the size of the windings and rectifier. Which on modern alternators is impossible considering there is no unused space inside the casing.

"mean green" and similar companies sell a high quality OE replacement alternator that is marketed with its peak amperage rating instead of the more realistic continuous amperage rating most are rated at.

I recommend upgrading the alt to a 130mm 136amp from a caravan (modification to the bracket is required to get the larger case to fit)

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95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
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Unread 07-24-2013, 04:53 PM   #10
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Quote:
Originally Posted by Holder350 View Post
No they won't, the only way to get more amps from an alternator is to increase the size of the windings and rectifier. Which on modern alternators is impossible considering there is no unused space inside the casing.

"mean green" and similar companies sell a high quality OE replacement alternator that is marketed with its peak amperage rating instead of the more realistic continuous amperage rating most are rated at.

I recommend upgrading the alt to a 130mm 136amp from a caravan (modification to the bracket is required to get the larger case to fit)

Sent from my phone
Finally, someone who know what they are talking about. The higher output is meaningless, unless you have a large load like a winch. The output is determined by the regulator, period end of story. Add up everything in your vehicle Headlights, AC on max stereo at window cracking volume, I doubt you will reach 80 Amps. The regulator will see this and adjust the output accordingly. Of course the alternator must be turning at rated RPM (about 1500 RPM's). Depending on the pulley's, 1500 Alternator RPM may or may not be 1500 Engine RPM. The only noticeable difference you probably won't notice would be a shorter re-charge time after starting.
OEM or equivalent is fine.

Regards,

Jim W
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