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Join Date: Jun 2003
Location: Fresno, CA
Posts: 7,779
What's the proper tension on alternator belt

My friend, who has experience with 911's tells me that my alternator belt is too loose and that I should move one shim from the rear to the front.

I'm just wondering if there is a standard method for setting the tension (like, once tightened, you should be able to turn the engine by turning the alt pulley).

I'm just wondering. January will be my car tuneup month so I will be replacing the belt with a new one so I'd like to hear from the collective experts.

Thanks............Vern

Old 12-28-2011, 01:07 PM
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Taking it apart is easy
 
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Join Date: Nov 2009
Location: rural Quebec, Canada
Posts: 1,878
There are technical articles on this site covering subjects such as the one you ask about. It is easy to find this information with a simple search.

The answer is that you should be able to deflect the belt 10 to 15mm using your thumb, halfway between the pulleys.
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PLEASE CHECK MY QUIZZICAL BLOG: www.ponderingporsches.blogspot.com
Old 12-28-2011, 02:43 PM
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Join Date: Jul 2007
Location: Greater Metropolitan Nimrod, Orygun
Posts: 55,993
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follow the directions carefully re using all shims and where to put them

keep the old belt in the trunk as a spare

good luck

Old 12-28-2011, 04:21 PM
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