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Discussion Starter · #1 ·
I purchased a well used 1980 280ZX 2+2, and have gradually, piece by piece, began restoring it to a drivable condition. My problem is the stator of the voltage regulator in the alternator was fried and not charging the battery so I replaced it. Everything was good for a couple of weeks, then it started to squeal on occasion when you first start the engine; like the one I changed did, and keeps getting worse. So I expect it to die any day now. What is causing my Z to eat alternators?
 

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Did you replace the fan belt at the same time? It could just be that the new belt has broken in and become more slack. The alternator has the most load on it just after starting so that's usually when you notice belts squealing...kinda like power steering belts also(because of the cold fluid.) Are there any other indications that the alternator has problems, low voltage, lights changing brightness?

> I purchased a well used 1980 280ZX 2+2, and
> have gradually, piece by piece, began
> restoring it to a drivable condition. My
> problem is the stator of the voltage
> regulator in the alternator was fried and
> not charging the battery so I replaced it.
> Everything was good for a couple of weeks,
> then it started to squeal on occasion when
> you first start the engine; like the one I
> changed did, and keeps getting worse. So I
> expect it to die any day now. What is
> causing my Z to eat alternators?
 

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Discussion Starter · #3 ·
> I purchased a well used 1980 280ZX 2+2, and
> have gradually, piece by piece, began
> restoring it to a drivable condition. My
> problem is the stator of the voltage
> regulator in the alternator was fried and
> not charging the battery so I replaced it.
> Everything was good for a couple of weeks,
> then it started to squeal on occasion when
> you first start the engine; like the one I
> changed did, and keeps getting worse. So I
> expect it to die any day now. What is
> causing my Z to eat alternators?

I burned out 3 alternators in a Chevy before finding out my starter was killing them. My starter was functioning, but was placing a constant load on my alternator, making it work harder than it could handle. I kept thinking I had an alternator problem, and kept fixing it with new alternators. After burning out the 3rd one I decided to check everything and I pulled off my starter and tested it. It worked, but slow and hard, and didn't sound right. I got a replacement one that worked right, installed it, and I haven't had an alternator problem since.

The point is to check for other causes as well. It might be the alternator's dying, but it might be something else killing it.
 

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Discussion Starter · #5 ·
> I purchased a well used 1980 280ZX 2+2, and
> have gradually, piece by piece, began
> restoring it to a drivable condition. My
> problem is the stator of the voltage
> regulator in the alternator was fried and
> not charging the battery so I replaced it.
> Everything was good for a couple of weeks,
> then it started to squeal on occasion when
> you first start the engine; like the one I
> changed did, and keeps getting worse. So I
> expect it to die any day now. What is
> causing my Z to eat alternators?

The squeal is the belt slipping in the alternator pulley, not the alternator. Tighten the belt. That will stop the squeal. Hope that solves your problem.
 
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