Alternator question...
Alternator question...
so for the very first time after 6 years of owning this FC, it finally broke down on me...and i think it's my alternator..?...my battery won't hold charge when my friend was giving me a jump, it only held power when the jumper cables were on. so i was wondering...where can i buy a new one?...i was looking into the Bosch Alternators for the 86-88...does anyone have any inputs on this item? or does anyone have any other suggestions on a different one? a link or webpage would really help. thanks! btw. i own a '88 TII.
Joined: Sep 2005
Posts: 25,581
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From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Make sure you get a Good Brand new alternator.not Remanufactured.they break down.according to One of the Big guys on Forum..Autozone is crap..Look into Revamping your electrical system with a Higger amperage alt(like from s4 to S5 or s4 to FD.).The battery?.that is your Choice.,My Suggestion is OPTIMA,as it is durable and is Good to know that you can also relocate the Battery to the INSIDE of the car if you desire to do so.(the conventional batteries give off Fumes,and are not safe because the spill acid)
Make sure you get a Good Brand new alternator.not Remanufactured.they break down.according to One of the Big guys on Forum..Autozone is crap..Look into Revamping your electrical system with a Higger amperage alt(like from s4 to S5 or s4 to FD.).The battery?.that is your Choice.,My Suggestion is OPTIMA,as it is durable and is Good to know that you can also relocate the Battery to the INSIDE of the car if you desire to do so.(the conventional batteries give off Fumes,and are not safe because the spill acid)
for the alternators, the S5 and FD, would they bolt right up to my S4? no custom brackets needed right? thanks!
Joined: Apr 2005
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From: And the horse he rode in on...
Regarding the Optima: unless you are intent on moving the battery inside the car, I wouldn't do it. They are expensive and there has been much discussion that the quality and performance no longer lives up to the original reputation. Apparently the company was bought out and the battery cheapened down.
Good Luck.
S5 alt should be an exact fit physically, but you will need a wiring change. The FD alt will need a pulley change and the same wiring change.
Regarding the Optima: unless you are intent on moving the battery inside the car, I wouldn't do it. They are expensive and there has been much discussion that the quality and performance no longer lives up to the original reputation. Apparently the company was bought out and the battery cheapened down.
Good Luck.
Regarding the Optima: unless you are intent on moving the battery inside the car, I wouldn't do it. They are expensive and there has been much discussion that the quality and performance no longer lives up to the original reputation. Apparently the company was bought out and the battery cheapened down.
Good Luck.
with the FD alt, what type of pulley would you need? and what's the wiring change consist of?...thanks!
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I presonally would go with an Odyssey battery instead of optima...i have had much better luck.
A PC680 would be enough to start a 13B...and if you are into over kill like me, you could get the PC925. (150 or thereabouts for the PC925)
You know, you could always just run another S4 alternator and not need to do anything.
Just my .02
A PC680 would be enough to start a 13B...and if you are into over kill like me, you could get the PC925. (150 or thereabouts for the PC925)
You know, you could always just run another S4 alternator and not need to do anything.
Just my .02
Joined: Apr 2005
Posts: 3,785
Likes: 30
From: And the horse he rode in on...
The pulley from your old alternator won't work on the FD alt because the hole is too small. You can have it drilled out, or you can go down to the parts store. Ask the guys to pull an old pulley off from a Chevy core alternator. They will only charge you a little bit or might even give it to you for free and it should work. They might even pull the pulley off the FD alt and put on the Chevy pulley for you. Don't go asking for these favors when they are really busy. Go there when they have 5 guys with nothing to do but restock inventory. They would all rather help you with a freebie than restock parts...

Basically modern alternators are three wire. You need to change one wire from the S4. One wire charges (big and fat), one wire goes to the gauges. These are the same on your S4. The other wire in your s4 goes to the ignition switch. This is the one to change. It merely needs hooked up so that it has 12v all the time. If you don't change this wire, the alternator will work just fine, but the battery will drain when the car is off.
Here is a picture.
Last edited by jackhild59; Sep 11, 2008 at 10:06 AM.
I presonally would go with an Odyssey battery instead of optima...i have had much better luck.
A PC680 would be enough to start a 13B...and if you are into over kill like me, you could get the PC925. (150 or thereabouts for the PC925)
You know, you could always just run another S4 alternator and not need to do anything.
Just my .02
A PC680 would be enough to start a 13B...and if you are into over kill like me, you could get the PC925. (150 or thereabouts for the PC925)
You know, you could always just run another S4 alternator and not need to do anything.
Just my .02
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