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Penetrating Oil Showdown!!!

Discussion in 'The Hokey Ass Message Board' started by Abomination, Apr 8, 2009.

  1. yoyodyne
    Joined: Nov 26, 2008
    Posts: 856


    After the rings rust, then the rust builds up between the cylinder walls and the pistons and wedges everything tight. Rust expands - Iron oxide takes up 10X the space as iron, it can break things like freezing ice.

    I recently heard of Fluid Film - sold mostly at John Deere dealers, said to be even better than Kroil. I'm going to try some. Also heard #1 oil is fantastic - It's like #2 diesel oil but thinner. So thin it's hard to keep it from leaking out of pipe fittings. Don't know where to get it though. Sounds like thin viscosity is important, like the ATF/Acetone brew. I know it sure can be hard to keep ATF from leaking out of gaskets and o-rings sometimes.
  2. Shifty Shifterton
    Joined: Oct 1, 2006
    Posts: 4,964

    Shifty Shifterton

    OK, so here's the million dollar question......

    Supposedly, ATF got it's reputation as a penetrant pre 1980s. Back when it was still whale oil.

    Now, ATF is a petroleum base like oil. So what makes the ATF special as a penetrant? Detergent additives? Is it acidic to dissolve corrosion?

    Just wondering aloud what makes modern ATF the perfect oil to thin with acetone.
  3. Bob Dobolina
    Joined: Jul 27, 2006
    Posts: 332

    Bob Dobolina

    ok...atf & acetone. If you whip up a batch of this, does it evaporate if not in a sealed/covered container? Reason behind this is...i have a baseplate assy that i am trying to free up. I understand that the acetone will attack the throttle shaft bushings, but if it loosens things worries.

    as for the original question...Kroil has worked wonders in the past for me. Spray the fastener in question & rap with a hammer, if you can get to it. 'Nother trick i learned from a buddy of mine is to tighten (or try to) the nut/bolt in question before trying to loosen it.
  4. 58Darlene
    Joined: Mar 29, 2009
    Posts: 152


    So can I mix soem of this up and keep it in a hand oiler, or some thing of the sorts? If it as handy as you guys are saying it is, I may want to keep some around.
  5. flathead31coupe
    Joined: Mar 23, 2006
    Posts: 1,596

    from indpls, in

  6. Johnny1290
    Joined: Apr 20, 2006
    Posts: 2,834


    this is really interesting, thanks for posting this.

    Where do I get acetone? Surely there's a better way than nailpolish remover?
  7. cafekid
    Joined: Dec 4, 2008
    Posts: 380


    we use stuff called twister at my shop... it works really good and has no silicones so you can use it if youre painting and not have any ill effects
  8. BillBallingerSr
    Joined: Dec 20, 2007
    Posts: 651

    from In Hell

    Something else too. I learned this from getting the top exhaust manifold bolts out of FEs. I use PB Blaster myself, but thats not in stone. But I warm the engine up and put candle wax on the boss (which is open to the bolt) and let it melt in to the threads and pull them running. Put a tight 6 point socket on it and take a hammer and tap on the ear of the head moderately while you work the bolt. You do't want to bust the ear off the head. I have still broken a few bolts off, its about inevitible with them, but this method helped more than about anything. If you can get a hammer at a 90° tapping on something you would be surpised what rusty stuff will come loose. I learned that working on old tractors.
    Last edited: Apr 8, 2009
  9. Retro Jim
    Joined: May 27, 2007
    Posts: 3,859

    Retro Jim

    Thanks a million for that tip !
    Something that works good and is real cheap , can't do better than that .
  10. Viscosity?
    It's about 7 weight from what I understand.

    Last edited: Apr 9, 2009
  11. djust
    Joined: May 31, 2006
    Posts: 1,230

    from Oklahoma

    Great Thread
  12. B.A.KING
    Joined: Apr 6, 2005
    Posts: 3,735


    i've used tranny fluid/acetone mix for years.bought a little squirter type oil gun to keep it in. it keeps,dosen't desolve. i guess you could mixe acetone with kerosene or oil . it just really thins it down.hmmmm i may have to try the kerosene/acetone combo see how that works. must folks think i'm crazy when i tell them what i use.but i work on a LOT of rusty stuff.and i seems to work best for me.jmo
  13. Shifty Shifterton
    Joined: Oct 1, 2006
    Posts: 4,964

    Shifty Shifterton

    Not really, I've worked with acetone in manufacturing as a production cleaner. Those companies just buy nail polish remover, it ends up being cheaper than buying acetone labeled as acetone.
  14. rustyford40
    Joined: Nov 20, 2007
    Posts: 2,168

    from Mass Bay

    I hide my Kroil so no one can use it. Yes I'm that kind a guy.
  15. Harry Bergeron
    Joined: Feb 10, 2009
    Posts: 345

    Harry Bergeron
    from SoCal

    Lamp oil is a refined kerosene, get it at the neighbor's yard sale.
    Often comes scented - citronella keeps the bugs away, lemon or vanilla will make the wife think you're polishing the furniture or baking brownies.
  16. I noticed on my wife's nail polish remover, that it's not just acetone, but a mixture of acetone, water, and other stuff. And there are some that have no acetone in them at all and use MEK instead. MEK seems even more toxic to me than acetone and smells worse.

    The hardware store sells pure acetone in metal cans. Or most lacquer thinners are made of acetone and other similar solvents mixed together.

    If you work with acetone remember that it is way more flammable than say ATF or kerosene. The flash point is -20 C, so it doesn't take much of a spark to ignite it. The fumes can ignite from some ignition source far away from where you're working.
  17. Abomination
    Joined: Oct 5, 2006
    Posts: 6,701



    Although I am a little strange, and sort of like the smell of PB Blaster... especially a few days after using it. :D


  18. Abomination
    Joined: Oct 5, 2006
    Posts: 6,701


    I wonder if there's something you could put into the acetone & ATF mixture to make it gel... you know, like if you want to smack a huge gob onto an exhaust bolt and let it sit overnight.

    Nitrocellulose, maybe?

  19. scootermcrad
    Joined: Sep 20, 2005
    Posts: 12,372


    I've always had great luck with ATF. An old-timer that restores Model A's total me about it some time back. I use a little syringe form the baby section of the pharmacy or I think autoparts stores sell them too. I put a little hose on it to get into tight places. Suck it up and apply it where I need. My Model A had been sitting in a field for at least 20 some years (probably longer) and everyone of the fender bolts was on there good. Little bit of ATF, let it sit for about a half hour and just about all of them came off with ease. Few stubborn ones though.
  20. hustlinhillbilly
    Joined: Jun 17, 2008
    Posts: 184

    from ohio

    You used to be able to buy acetone at Ace Hardware in the paint section, at least you could about 4 years ago.

  21. Like dis?



    Dunno what happened here.
    Supposed to be straight kerosene.

    May have had something else in the drums prior to when I bought it.

    That's what you get when you try to do the bargain basement bit....:eek::D
  22. Abomination
    Joined: Oct 5, 2006
    Posts: 6,701




  23. BillBallingerSr
    Joined: Dec 20, 2007
    Posts: 651

    from In Hell

    If you put a fish oil cooker under it you might get an Iranian sattelite launch. :D:D:D

    That would make for a curious piece of space junk in orbit. "Mission Contol"... there's what apears to be a parts washer in low earth orbit..."
  24. I'd heard of guys using ATF on rusted parts but never tried it, thanks for the info, I'll give the home brew a try.
  25. I'm surprised only one guy mentioned the Wax trick. Every old time flat head guy i know uses this method to remove flat head studs which can be the hardest things on earth to get out without breaking.
  26. alchemy
    Joined: Sep 27, 2002
    Posts: 16,727


    I thought old Ford spring perch pins were the hardest things on earth to remove?

    Could a guy mix up a couple gallons of acetone/ATF in a large pan to soak his axle/perch/wishbone in, and it might not all evaporate away? Sounds like it might be a lot cheaper than a couple gallons of Kroil or other penetrant.

    What kind of ATF? Type F for Ford parts, and Dexron for GM?
  27. JokerJ
    Joined: Oct 11, 2003
    Posts: 93

    from Hobergs

    Back in the `90's when I was a slave to corporate america, our stockroom (boy, I do miss that) had a penetrating oil like no other. It was call "Let-Go" and was propane based. It smelled like propane but worked wonders on tight rusty bolts. Anybody else use this? I'd love to buy more if it's still even made) but can't find it anywhere...
  28. yoyodyne
    Joined: Nov 26, 2008
    Posts: 856


    If you get tired of crappy oil squirt cans, try these - I bought them at a beauty shop supply store, the local one is Sally Beauty Supply. I've never put acetone in one, not sure how that will hold up.

    Attached Files:

  29. plym_46
    Joined: Sep 8, 2005
    Posts: 4,018

    from central NY

    aceton will pretty much eat up all plastics.
  30. LZ
    Joined: Sep 9, 2007
    Posts: 618


    Ya Acetone is a bit Nasty but it will keep Fine in a Polyethylene Bottle or a Teflon Bottle.
    We use Lab Grade Acetone like water at work. We have Squirt dispensers years old with Acetone and other Nasties in the Chem Cabinets..

    Here is a Local place that specializes in this sort of thing. Check there Tech data and such.

    We use to build molds for them .

    Pure Acetone is available at Lab supplies and Good Hardware stores. Sometimes at NAPA's and Paint Stores if your a bit out there. Never bother with nail polish its watered down and not the same as it was years ago..:rolleyes:
    Acetone great to have around as it is an excellent cleaner for surface prep when bonding..

    Ya the Tranny fluid deal is old. I remember my Dad using it.

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