Alternator 1989 Buick Century


Old 02-23-04, 08:49 AM
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Join Date: Jun 2002
Posts: 54
Alternator 1989 Buick Century

I am replacing the alternator in my '89 Century, but I'm not sure how to take the tension off the belt. There is a small idler pulley below the steering fluid pump... can't tell if that's a tensioner or just a pulley? Any help or suggestions are appreciated.
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Old 02-23-04, 08:54 AM
Thread Starter
Join Date: Jun 2002
Posts: 54
sorry, forgot.
its a V6, 3.3l
Old 02-23-04, 10:13 AM
carguyinva's Avatar
Join Date: Nov 2003
Location: Shenandoah Valley
Posts: 1,147
put a wrench...

...on the bolt head in the center of the pulley and try to swing it one way or the other, if it doesn't move, it's just an idler...but there IS a tensioner on it. the tensioner may have a square hole in it for you to put a 3/8" ratchet drive (or a breaker bar) into. some even have a square end at the end of the tensioner assembly that you can put an open end wrench on....personally, i believe that yours will have the first type i mentioned and it has an 18mm bolt that you use to swing the tensioner with.

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