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Best penetrating oil for stuck nuts & bolts

Discussion in 'The Hokey Ass Message Board' started by 777, Jan 31, 2013.

  1. 777
    Joined: Jul 17, 2008
    Posts: 196

    from Pasadena

    Recently an article was passed along to me from Machinist Workshop Magazine.
    They tested some commercially available penetrating oils on a group of nuts & bolts they had scientifically rusted to a uniform degree in a salt water solution.

    The fasteners were treated with a variety of commercially available penetrants and the measured torque required to loosen them was recorded.

    The break out torque required for:
    Nothing = 516 ft. lbs.
    WD-40 = 238 ft. lbs.
    PB Blaster = 214 ft. lbs.
    Liquid Wrench = 127 ft. lbs.
    Kano Kroil = 106 ft. lbs.
    50/50 blend of ATF and Acetone = 50 ft. lbs.

    It was pointed out that this was a topic a few months ago, so I read through that thread and did notice someone also recommended GM 1052627 heat valve/EGR lube and I have personally used a similar Mopar EGR product for years that works very well but it is definitly more costly then used ATF and Acetone.

    And a final note on shop safety and penetrating fluids:
    I was spraying some exhaust bolts on an engine that wasn't running but was warm, when the penetrant hit the bolts it evaporated a bit. The fumes drifted my way and even though I was wearing safety glasses I got some residue in one eye. Flushed the eye for about 20 mins, it remained blurry and irritated so I headed to the emergency room.
    Brought the can along and the doctor about feel over when he read all the solvents that were in it, long story short, 3 hour eye flush on some hospital machine to get the ph normal in my eye socket.
    Last edited: Jan 31, 2013
  2. coupe33
    Joined: Nov 23, 2004
    Posts: 650


    I read this one on here a couple months ago and the acetone and ATF definatly work best! Previously I used Kroil and it also worked real well.
  3. seems I never have acetone around when I need it........but I ALWAYS keep kroil on hand
  4. TurboX2
    Joined: Oct 1, 2012
    Posts: 207


    SO-K is a good penetrant also but not always found easy and a new brand Hillco lube is something we use at work alot.

  5. flopalotofit
    Joined: Apr 1, 2010
    Posts: 130


    This mix works well, trouble is finding a sprayer that can handle the does a good job of disolving the seals.:( Those tin cans with a spout on the top work best but dont spray. Caution !! Acetone is exremely FLAMMABLE !! vapors travel and any spark can set it off.:eek: Acetone is what is in your acetelyne torch bottle!!
  6. BobMcD
    Joined: Jan 25, 2013
    Posts: 322


    I've been using PB Blaster. It's readily available. I can get it at Walmart at a decent price. Need to be patient and let it work. I will spray it on the bolts and let it sit overnite if possible. Has not let me down. I haven't used Kroil but have heard good things about it. I may give the acetone mix a try and see how it works.
    Bruce Fischer likes this.
  7. chopperwolf
    Joined: Dec 10, 2010
    Posts: 53


    Kroil has worked great for me.
    Roger O'Dell likes this.
  8. lawman
    Joined: Sep 19, 2006
    Posts: 2,665


    Here we go again !!! LOL
  9. 777
    Joined: Jul 17, 2008
    Posts: 196

    from Pasadena

    Hadn't noticed it was a topic before, I did go back and add that and a couple of other thoughts to my initial posting.
  10. specialk
    Joined: Sep 28, 2005
    Posts: 598


    How about the new product from WD-40?
  11. 1931modela
    Joined: Nov 4, 2011
    Posts: 262

    from montana

    up up up up up up up up up up up up up up up up up up up up up up up up up STOP THIS
  12. chubbie
    Joined: Jan 14, 2009
    Posts: 2,318


    OK, maybe redundant. but its good information. seems when i'm work'n on old cars the rust never ends!!! I use a spray bottle with ace/trans. time and recoat it does work the best
  13. FiddyFour
    Joined: Dec 31, 2004
    Posts: 9,011


    that'd be acetone. . .;)
  14. Tnomoldw
    Joined: Dec 5, 2012
    Posts: 1,563


    10 -15 % increase in fuel milage with 3 oz of acetone per 10 gallons in you gasoline will improve your milage. use no more than 2 oz in 10 gallons for a diesel.Bill aka Tnomoldw :)
    You despise winter? Me too. That's why I live where we really don't have winter. I remember in '74 some white stuff fell from the sky. I called 911. They said it was snow and not to worry. It was Robert E. "Bob" Fitzgerald and his colleagues who implemented the first 911 system in Haleyville (Ala.) in 1968.:D
    Joined: Nov 17, 2007
    Posts: 381


    x2 on the pb blaster.
  16. And yours or someone's ole lady is soaking there finger nails in acetone :eek:double:eek :eek:
  17. couvy
    Joined: Aug 21, 2011
    Posts: 35


    Does the acetone added to gas in tank cause any problems in fuel system? Just had an OT car burn up fron ethanol detoriated fuel lines.
  18. Joey7319
    Joined: Nov 7, 2007
    Posts: 119


    a lot of times I use candle wax on exhaust bolts and it works really well. put a bit of heat to the stuck bolt and then rub the old candle on it. the hot wax will chase the threads and stays in place. all the rust and crud gets carried out with the wax. Give it a try it may suprise you, at how well it works.
    Andy likes this.
  19. Tin Can
    Joined: Nov 18, 2005
    Posts: 2,096

    Tin Can

    We used some "deep creep" recently at the shop. It worked awsome.

    Attached Files:

  20. ty johnson
    Joined: Mar 16, 2006
    Posts: 597

    ty johnson

    At work we use parts cleaner and atf mix.
  21. I have never read an article I just use liquid wrench because I do.
  22. jesse1980
    Joined: Aug 25, 2010
    Posts: 1,355


  23. big bad john
    Joined: Aug 11, 2010
    Posts: 4,727

    big bad john

    liqiud wrench works for me.....most of my friends use it also...
  24. Cymro
    Joined: Jul 1, 2008
    Posts: 747


    Plus gas is pretty good (if available in the USA)
    or Morris's not so easy to get hold of these days, or simply brush some diesel oil on the thread and leave overnight, smelly but effective and cheap, some old timers used to mix paraffin (kerosene?) and diesel specifically to use as penetrating oil.
  25. slowmotion
    Joined: Nov 21, 2011
    Posts: 3,309


    Just for the helluv it, I mixed up some ATF/Acetone. Had a little exhaust work to do on a OT involving the converter flange. Usually use Liquid Wrench or PB, but since there's been alot of talk on here (several threads) lately about this magic juice, I thought it was a good time to give it a shot. FWIW, the flange was factory installed on a '99, & never ephed with. Gave it a good squirt the night before, also had the hot wrench as a back-up, just in case. When I got to it the next morning, the bolts did come loose fairly easy. I'd say it worked pretty good, I'll probably keep some mixed up. YMMV of course.
  26. mohead1
    Joined: Jan 18, 2013
    Posts: 595


    Kroil, used it for years, no mixing, no high flammability issues.....just works.
  27. JEM
    Joined: Feb 6, 2007
    Posts: 1,040


    I just had occasion to compare PB Blaster and the acetone/ATF mix on some outer tie-rod ends on a non-HAMB vehicle just East Coast enough to have some minor corrosion.

    Neither tie rod end would budge with typical 12in Stillson wrench, etc. force (the vehicle concerned, a C5 Audi S6 with the tie rods well up in the fenders, doesn't lend itself to hanging oneself from the wrench or a three-foot pipe cheater.)

    Soaked one side in PB Blaster, the other in ATF/acetone, went for lunch.

    Both came loose afterward, but the ATF/acetone side was noticeably easier to break free and, after a little rocking and a couple more squirts, it came out mostly by hand.

    The other side got about the same manipulation but it required wrenching pretty much all the way out.

    Not a conclusive test but good enough results that I'll keep some handy.
  28. Mark Hinds
    Joined: Feb 20, 2009
    Posts: 608

    Mark Hinds
    from pomona ca

    I've tried many a concoction and ATF and Acetone works about the best for me so far.....
  29. blowby
    Joined: Dec 27, 2012
    Posts: 8,313

    from Nicasio Ca

    It's best with one olive and no ice...

    I suppose MEK would sub for the acetone.
  30. mrspeedyt
    Joined: Sep 26, 2009
    Posts: 802


    wonder how well the ATF/acetone mix would work as a carb/injector cleaner? I have one injector on my '91 'burb acting up. so far I've run 3 cans of Berryman AND 1 can of sea foam with great improvement...but still needs a little more cleaning it seems.

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