alternator

[jeepguy46176]

today a bunch of us went to haspins acres a local offroad park and i hit a big mud hole with standing water that went up over my hood and after about an hour my alternator quit working would it do any good to clean it out or should i just get a new one thanks for any help

 

[LVRockCrawler]

depends on your motivation level.... you could have fried it or it may respond well to a good cleaning (get a good elec. contacts cleaner)...

 

[jeepguy46176]

well when i jump it the gage stays up for a min. or so after i unhook the other car then it drops to nothing i just thought if it was fried it would stay dead all the time but i really dont know much about it

 

[White]

is it a denso ?

 

[jeepguy46176]

? it is the stock one

 

[jeepguy46176]

oh yeah and it is a 97 tj 4.0

 

[White]

I will take a wild guess its the denso 75. If the miles are high on it, replace it. Nows a good time to upgrade to a 200amp unit I think you fried the internal regulator. But what do I know, I am all the way over here and never seen it.
Rather then rebuild a stock unit, I think a new one is the way to go.

p.s. try cleaning it up, Who Knows.

 

[Bounty__Hunter]

The '97 TJ is a NipponDenso, probably the 117A.

Check out www.car-parts.com for a stock replacement, or look to upgrading to a 136A unit from a late '90s XJ, ZJ, Dodge truck, Dodge van, etc. The part # is 56027913 and it's basically a direct bolt in.

I put this in my '95 YJ upgrading the stock 70A NipponDenso to the 136A, almost doubling the output for $45 to help keep up with the winch.

 

[jeepguy46176]

will i have to do any fabrication or anything like that to make it work

 

[XJNick]

Hi,

If installing a larger alternator, you'd want to install larger gauge wiring from the alternator to where it connects (i.e. a distribution stud or the starter solenoid). For 175 amps you'd probably want around #4 or #6 AWG wire.

-Nick :!:

 

[Bounty__Hunter]

Only modifications is to swap your 6groove pulley for the 7groove on the 136A, and to swap out the plastic boot where the hot wire hooks up, it's 180* off. Both very simple. May also have to move a sleeve in one of the mounts about 1/4", I did it with a c-clamp. Takes about 20 or 30 minutes to change it out, very easy.