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Old 07-07-2003, 11:19 PM   #1
C&C Chevy
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Alternator question

What does "11 o'clock" and "3 o'clock" mean with alternators? Is that supposed to be the position of the alt. relative to the crank pulley?
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Old 07-08-2003, 12:09 AM   #2
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probably... what was the context?

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Old 07-08-2003, 05:08 PM   #3
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I was looking at getting a Power Master alternator and the site (YearOne) has 140 amps for "11 o'clock" and "3 o'clock", and both are listed as 87 models.
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Old 07-08-2003, 07:23 PM   #4
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The 11 o'clock are for nonserpentine belt systems. The 3 o'clock are for serpentine belt systems like Vettes and sports cars. But the 3' I've seen are on later LT1 and LS engines.
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Old 07-08-2003, 08:45 PM   #5
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Thanks, G!
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Old 07-11-2003, 06:00 AM   #6
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"Clock" positions are figured by the plug's (the main plug on the alt) position "as mounted". Hope this helps!
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Old 07-11-2003, 11:23 AM   #7
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Sounds good to me too. I'm just guessing.
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Old 07-11-2003, 11:49 AM   #8
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Yep, I agree with M1A1driver. that is what they are refering to. The position of the plug in relation to the vertical centerline of the engine.
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