Thread: alternator nut size?

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  1. #1 alternator nut size? 
    GT Level Member jdmgtp's Avatar
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    I need a new nut for my alternator, the one that goes to the positive cable. Anybody know what size I need?
    2000 GTP, 3.2 pulley, SD headers, 3" exhaust, modded 1.9's, custom CAI, LS6 maf, ported blower/ TB, HPT, 65 lb injectors, E85 in the summer, LM-1 wideband, 180 stat, autolite 104's, GMHD suspension kit. 13.2@104 on street tires w/o ported s/c
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  2. #2 Re: alternator nut size? 
    Turbo is the way to go. REDCRAPGP's Avatar
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    Hmm doesn't it fit a 13mm socket. If I'm correct you should be able to take a socket in one of your local hardware stores and find a nut that fits inside.
    Squirrels are my engine. I need a Ford Regal
    04 Comp G.
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  3. #3 Re: alternator nut size? 
    GTP Level Member Twizted 1's Avatar
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    8mm I think. I'll find out for sure in the morning.
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  4. #4 Re: alternator nut size? 
    GT Level Member jdmgtp's Avatar
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    Nothin huh?
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  5. #5 Re: alternator nut size? 
    I live here. Slick2500's Avatar
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    13mm.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower
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  6. #6 Re: alternator nut size? 
    GTP Level Member Twizted 1's Avatar
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    Shoot, I forgot. And no it's not a 13mm.
    But a 13mm wrench will fit it.
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  7. #7 Re: alternator nut size? 
    GTP Level Member Twizted 1's Avatar
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    I just went and put a thread gauge on it and it shows to be a 8mmx1.25.
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  8. #8 Re: alternator nut size? 
    Too broken to be broke $$ ntreftz's Avatar
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    if its not 13mm its 1/2in, though Grand Prix's are primarily metric.
    Poly Uppers, 3.5 snout, HAI, Can Tune, STB, Autolite 606 coppers, 2.5 cattless dp
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  9. #9 Re: alternator nut size? 
    GTP Level Member Twizted 1's Avatar
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    Yea a 1/2"socket will fit to take it off but I think he wants to know the size of the threads.
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  10. #10 Re: alternator nut size? 
    GT Level Member jdmgtp's Avatar
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    It's ok guys I'm taking the nut up to the hardware store today
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