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Thread: Penetrating oil test

  1. #1
    Billy Golightly's Avatar
    Billy Golightly is offline Always finding new and exciting ways to not give a hoot in hell Catch me if you can
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    Penetrating oil test

    http://sterkel.org/papers/vintage/Te...ating_Oils.pdf


    Really interesting results. Shows Kroil as being by far the best commercially, on the shelf available product. But also has a surprising result from a home-brew mix? Check it out. Watcha guys think?
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  2. #2
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    I've always had luck with PB blaster.....so, if these results are good, then a little PSF+Acetone will be what I try next time. Pretty large difference for sure.

    The acetone is a fairly strong solvent so I can see how it would reduce the surface tension of the PSF and allow it to flow into small surface voids more easily.

    Amazing how things make sense after you read about someone else doing it...

    Thanks for the post on this Billy!
    -BFC
    '86 250R

  3. #3
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    I have not read the link yet but from my experience Kroil is tops IMO.
    I have given a couple of cans to board members as gifts and both have said they have had amazing results with it.
    I am flushing out a frozen up bottom end tomorrow and will be using a 50/50 mix of acetone and tranny fluid to fill up the innards to let soak for a week or two.

    I will let you all know the results

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  4. #4
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    +1 on that jes, I use that combo on a lot of stuff. Kroil is good for milling and drilling out stuff as well, I used to use it on stuff til I couldnt find it anymore. I use ENGAGE by Drummond American and Zep 45NC, they work great but are expensive. I use PB for stuck pistons and tapping.
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  5. #5
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    Another vote here for Kroil.

  6. #6
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    ill have to try that mix..
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  7. #7
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    i have used Kroil for many years and there is no comparison. makes PB blaster look bad. i know most people are sold on PB blaster but you need to try Kroil and see for yourself.

  8. #8
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    I use kroil, found nothing better, PB Blaster on normal stuff but when it gets ugly I go to the can of Kroil

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  9. #9
    Mosh is offline I'm the one with all the 2 stroke around here! The day begins with 3WW
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    I have used quite a few different penetrants over the years on some rusty ass, I mean bad rusty cars.

    Of all I have used hands down there is only 2 that really work, but I have yet to try Kroil cuz I never had to once I found this stuff.

    GM heat valve lubricant, also made by Dodge.
    http://www.merchant-automotive.com/h...lubricant.aspx


    This stuff is awesome. Back in the day when Carbs were still on engines, this stuff was made for the heat diverter valves on the old exhaust systems that had linkage always rusting up.
    It is still used today for lubricating stuck EGR valve pintles.
    Back when I was pulling alot of transmissions, as soon as the car was on the rack, I soaked the rusty exhuast studs down for a few hours and 9-10 times they came loose with little effort after soaking. The more you let it soak, the better it works.
    It also works great for siezed caliper pins, rubber o-ring lubricants, and general lubricant on just about anything that requires cleaning rusty stuff.

    PB Blaster, that stuff is only good for lubing door hinges and my ratchet heads.
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  10. #10
    Billy Golightly's Avatar
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    While all of these commercially available products are good, did ya'll see how the home-brew atf-acetone mix did in comparison?
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  11. #11
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    Wow... Kinda blew me away... Gotta mix up some atf-acetone and go find me some rusty crap to take apart...
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  12. #12
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    Very interesting, but what is PSF? Power steering fluid?
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  13. #13
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    yeah. Ive used the ATF/ Acetone mix on a Honda XL cylinder that was rusted SHUT. It is running as of now and has great compression and power. Its pretty cheap too. Use +4 or Dex/Merc III, it works best.
    You will cry, you will scream if you've heard half the **** I've seen.
    Are you gonna get up and burn an X in your head?
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  14. #14
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    In the steel mills we use Kroil all the time, that stuff works great.
    I have a couple of Honda Trail 70's and one of the handle bar bolts was froze on. Sprayed some in the bar end and waited a couple of days and it came off like warm butter.
    I'll have to try the ATF/ACT mix.
    The Royal Purple Synthetic Lube spray works good too.http://www.royalpurple.com/protect-parts.html Beets
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  15. #15
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    I use KROIL myself........

    Was it this site or another that stated that brake fluid was a fantastic penetrating oil?? I know I read it somewhere in the last few months because I was surprised.......
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