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Thread: Rusted Nuts

  1. 10-28-2009, 03:00 PM #1
    CurtEgerer
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    Rusted Nuts

    From a friend:

    Machinist's Workshop magazine actually tested penetrants for break out torque on rusted nuts. They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment.

    Penetrating Oil Type ..... Average Load to Free
    None ....................................... 516 pounds
    WD-40 ..................................... 238 pounds
    PB Blaster ................................ 214 pounds
    Liquid Wrench ........................... 127 pounds
    Kano Kroil ................................ 106 pounds
    ATF-Acetone mix..........................53 pounds

    The ATF-Acetone mix was a "home brew" mix of 50 - 50 automatic transmission fluid and acetone. Note the "home brew" was better than any commercial product in this one particular test. Our local machinist group mixed up a batch and we all now use it with equally good results. Note also that "LiquidWrench" is about as good as "Kroil" for about 20% of the price.
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  2. 10-28-2009, 03:28 PM #2
    orange911
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    Now I know what to do with the nearly 2 gallons of used ATF out of my other car. Make 4 gallons of "rusty-nut breaker"
    Olin - Member #1375
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  3. 10-28-2009, 05:40 PM #3
    911scfanatic
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    good to know...and I just bought a can of PB Blaster.
    Bill G.

    1968 911 Ossi Blue coupe...full restoration in process
    Done: Engine; transmission; suspension; gauges; wheels; rust repair & primer; brakes; paint
    In progress: electrical; the tedious, endless, horrible fastener sorting/plating
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  4. 10-28-2009, 05:45 PM #4
    CurtEgerer
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    The minimal difference between PB Blaster and WD40 is surprising! Although I can't ever remember using PB Blaster and saying, 'wow, that really worked well.'
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  5. 10-28-2009, 06:05 PM #5
    911scfanatic
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    And I'm assuming no toxicity for the 50/50 mix beyond what is typical of the others.
    Bill G.

    1968 911 Ossi Blue coupe...full restoration in process
    Done: Engine; transmission; suspension; gauges; wheels; rust repair & primer; brakes; paint
    In progress: electrical; the tedious, endless, horrible fastener sorting/plating
    EarlyS #718 | RGruppe #437
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  6. 10-28-2009, 06:19 PM #6
    Jim Garfield
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    Quote Originally Posted by 911scfanatic View Post
    And I'm assuming no toxicity for the 50/50 mix beyond what is typical of the others.
    You don't want to drink the acetone, but we give the kids atf for scratchy throats.

    Interesting chart, good to know. I wish I didn't have a whole gallon of PB Blaster in the garage though - dammit.

    "Our local machinist group" ?? I knew it was only a matter of time after you got that Bridgeport milling machine......
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  7. 10-28-2009, 06:19 PM #7
    BBausser
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    When you buy the acetone you will have to fill out all the DEA paperwork. Looks like amazing results.
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  8. 10-28-2009, 07:19 PM #8
    tfiv
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    Very interesting.

    There is still nothing like heat though. Even the crustiest heat exchanger nut comes right off when it's bright red.
    Tom F.

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  9. 10-29-2009, 05:47 AM #9
    jaudette3
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    Yeah, but nothing in the garage smells as good as Kroil.

    Cheers,
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  10. 10-29-2009, 09:43 AM #10
    Fritter
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    Hey, what about Rost Off??

    I agree, nothing beats a little heat with a handheld propane torch. Creeeeeeaaaak.
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