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Registered User
Join Date: May 2005
Location: Houston
Posts: 3,741
Question On Alternator? Are These Cars Hard On Them?

Guys - I have been nursing my alternator for months, it has got exponentially worse lately and with the fear of being stranded, ordered a new one (rather reman. Bosch unit) from Imagine.

I removed the old one which was not bad at all except for my large hands! Took a couple of hours taking my time. For those who have never done it...its not bad at all.

I noticed that my car had a re-man. alternator (thought I was going to find the original unit) in it and so this at minimum is the 3rd alternator in the car. My car has 58K on it and so thats alot of alternators for very low mileage.

I am thinking that previous owners probably let the car sit for long times, letting the battery drain down and then jumped in the car and the alternator was working overtime to charge a really low battery, contributing to a very much reduced life of the alternator itself.

-Or- are these cars typically hard on alternators?

Your thoughts?

I will post up new pics after I get my fan and housing back from the Powder Coaters. Ironically I was talking to Schnele (Lincoln) on the 'phone just as I was starting yesterday morning....LOL! "Hi" Linc!

Hope everyone is having a great weekend.

Regards - Yasin
Ole Skool - wouldn't have it any other way
Old 03-11-2007, 07:44 AM
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Forced Induction Junkie
WERK I's Avatar
Join Date: Jan 2003
Location: Wisconsin
Posts: 3,267
I think the main thing that fails on these units is the rear bearing. Usually it's because of improper belt tension(too high) that causes bearing loads that accelerate bearing wear. A lot of people fail to check the belt tension after the engine of fully up to temperature which will actually be tighter after the first adjustment cold. I tend to set mine on the loose side of the spec and then recheck after the belt has run in.
The brushes also seem to wear out quicker than our American counterparts. I've seen brushes and slip rings completely worn after only 70K miles. Maybe that was an exception.
If you have a alternator or starter repair shop in your area, getting your alternator rebuilt by them is a far more cost effective solution. I had mine rebuilt for $55 by Fondy Electric and they did a great job. These alternators are not that uncommon. Sure, the mainshafts are different than anything out there, but the internals are used by a number of foreign cars.
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 03-11-2007, 08:48 AM
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Noah930's Avatar
Join Date: May 2005
Location: Los Angeles
Posts: 13,358
Doesn't Leffingwell's buyers guide on 911s mention this problem? IIRC, he writes that the alternators are known problems, and to not be surprised if they only last 40K miles. Your 3-in-58K-miles might be a little quick-wearing, but maybe not totally unreasonable.
1987 Venetian Blue (really looks like grey) 930 Coupe
Old 03-12-2007, 08:55 AM
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Registered User
Join Date: May 2005
Location: Houston
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Thanks fort he replies guys! Much appreciated!

Ole Skool - wouldn't have it any other way
Old 03-12-2007, 07:49 PM
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