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  1. #1
    Junior Member
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    Apr 2006
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    so. Cal
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    39
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    MidnightBlue
    2001 TransAm

    oil drain plug size

    what size is it? i am having issues. think i need some sleep, but i can't get the damn thing off. . . . .thanks

  2. #2
    Junior Member
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    Mar 2006
    Location
    Tennessee
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    16

    black
    1999 Pontiac Trans Am

    If you mean the wrench size, 15mm. Tighten to 225 inch lbs.

  3. #3
    Senior Member
    Join Date
    Jul 2005
    Location
    Jacksonville, FL
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    2,723
    Yep, 15 MM. Oil change places like to overtighten it; filter too.

  4. #4
    Junior Member
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    May 2018
    Location
    Texas
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    1

    Arctic White
    1999 30th Anniv Trans AM

    Originally thought that this topic would cover drain plug thread size. I believe I have since found the right drain plug on Jegs as Thread Size: M12-1.75. Is that correct?

    Also, it appears they also sell a rubber washer/gasket for the drain plug. Does the stock LS1 drain plug have a replaceable rubber washer/gasket on it?

    Mine is seeping and I'd rather replace a washer instead of the whole drain plug if in fact it's replaceable. Thanks for any help.

  5. #5
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
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    orlando, fl
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    7,364

    black
    2014 camaro 2ss/rs

    yes it is 12mm x 1.75. just buy the whole bolt. i think the gasket is integrated.
    Cold Air Intake, Muffler Delete, Vinci High Performance Dual Valve Springs, Hardened Pushrods, Yella Terra 1.85 Rockers, Some Hydropdipped Stuff, Strut Tower Brace, Some SS Badges, boost/vacuum gauge, fuel pressure gauge, some checkered stripes, drilled/slotted rotors, ZL1addons Stealth wickerbill, Ruxifey LED side markers

  6. #6
    Member sjgreen6's Avatar
    Join Date
    Dec 2009
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    Mechanicsburg, PA
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    541

    Navy Blue
    2002 Trans Am WS6 Conv

    Current GM Part number is 11562588. Has the integrated gasket.
    ATI Procharger, SFCs, Y-pipe, LM2, BBK Shorty Headers, Corvette N73 Magnesium Wheels, 4th Circle Designs Stripe and Overlay kit

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