have u done this yet?

Not yet...I don't have volt meter handy, but I am going to borrow one from a friend. Where do I put the two ends of the meter?

on the battery posts, read the voltage with the car off, and read it while the car is running, at start up, and then a few minutes after

Would this work in my car? I would take it that it a 140 amp since its from an SSEi. I won't pay more then $15-20 for it...just as more of a temporary fix.

That'* not the 140amp alt... That looks like my old 105, and my new 140 is bigger, and has a different fan.

My mistake. I thought all SSEi alts were 140amps from the factory. But none the less, it should fit in my '89, correct?

L67 and L27 are the same. Ln3 might be, but i can't say that without looking at them..
However L27'* are just an upgraded LN3, so it may be exactly the same.

Yes, they will work out just fine. Merlin 91/97 has a 140 in his '91 [LN3] from a 93 SSEi or something. Just may be a little tighter than normal.. but hey nothing that a little butter can't help with .


-justin

Thanks, hopefully I can afford an alternator soon.

It was nice out today and I took some voltage readings, maybe you guys can tell me the health of my charging system.

With the car running, I got 14.4v (idle). I tried reading the voltage with the signal light on (the meter was going up and down in the car) but the reading from the battery posts didn't move.

In accessory or on positions I got 12.5v. With the car off, the reading was 13v. I then started the car, and shut it off. The reading was then 12.5v. I started it and shut it off again and it was back to 13v.

So what are your thoughts?

Thanks!

I don't think those numbers are all that unusual. If you were measuring _18_ volts at any time, I would yank the alternator immediately, but what you're measuring now is within normal range.

If you're seeing voltage fluctuations when driving at night, etc., I would definitely clean both ends of all battery cables, and any other common ground points where a number of circuits come together. A poor ground connection on one circuit can cause a reverse current flow seeking ground through the other devices that share the same connection point. It won't be all that noticeable unless or until the other devices come on as well, and then you've got a choke point when two (or more) hot circuits can no longer use each other as a ground path, and the intended ground connection is not good enough to support them. So go looking for cruddy or corroded battery cables and ground connections.