OP
@miguel avatar
UTC

Veni, Vidi, Posti
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
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Veni, Vidi, Posti
@miguel avatar
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
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UTC quote
I was trying to pull a screw out of a part today and it just felt like I was going to strip the head. On the way to the hardware store to get some penetrating oil, I stopped at my car mechanics to return the loaner car and pick up my car. The only person still there was one of the mechanics working on his own car. I asked if he had any penetrating oil and any ideas about how to get the screw out without stripping the head. It is a Phillips head and recessed into a plastic part.

He said they use Aerokroil oil and "its the best stuff they've ever found".

After letting it sit for a few hours, I attempted to remove the screw. It came right out. Voila!

I purchased a can tonight. It's pricy at $20 on Amazon.

I'm sure there are a bunch of other good solutions but I was impressed with Aerokroil and the mechanics strong recommendation so thought I'd pass it on.

They have a bunch of other interesting products on kanolabs.com

Best
Miguel

External inline image provided by member with no explanatory text
@old_as_dirt avatar
UTC

Veni, Vidi, Posti
2007 GTS
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@old_as_dirt avatar
2007 GTS
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UTC quote
I have been preaching about this stuff for YEARS now here on MV.

There simply is not a better product for rusty bolts.

the worst bolts I ever had to deal with are the exhaust manifold bolts on a truck.

A little spray and a couple hours and viola they eased right out with out using any heat.

I order direct from them
@ape avatar
UTC

Hooked
P200E
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Hooked
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UTC quote
old as dirt wrote:
There simply is not a better product for rusty bolts.

Sir you have not used a product called Hilco. We use it at work and it will get any bolt loose. It wicks deeper into threads than anything I have ever seen. Give it a shot if you ever run across it, may change your world 🤙
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Veni, Vidi, Posti
2007 GTS
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Veni, Vidi, Posti
@old_as_dirt avatar
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UTC quote
Ape wrote:
old as dirt wrote:
There simply is not a better product for rusty bolts.

Sir you have not used a product called Hilco. We use it at work and it will get any bolt loose. It wicks deeper into threads than anything I have ever seen. Give it a shot if you ever run across it, may change your world 🤙
send me a can.
@ape avatar
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Hooked
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Hooked
@ape avatar
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UTC quote
old as dirt wrote:
Ape wrote:
old as dirt wrote:
There simply is not a better product for rusty bolts.

Sir you have not used a product called Hilco. We use it at work and it will get any bolt loose. It wicks deeper into threads than anything I have ever seen. Give it a shot if you ever run across it, may change your world 🤙
send me a can.
Alright, PM your address I will send a can next week.
UTC

Enthusiast
2012 GTS & '04 ET4
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Enthusiast
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UTC quote
Kroil is awesome stuff. Doesn't take much to do the job, so the cost is spread out over a longer time. At least that's my experience. I used to have a mid-1950's tractor and bolts that hadn't moved in 60 years would break free much easier using Kroil.
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2021 GTS 300 HPE +2013 GTS 300ie + 294 Polini
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@fudmucker avatar
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UTC quote
Make your own penetrating oil using left overs.

50% Automatic Transmission Fluid
50% Acetone
@waspmike avatar
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UTC quote
^ Fudmuckers is the best in all tests, that include it.

Acetone creeps and carries the ATF with it. I am lucky as I can buy acetone as nail polish remover.
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UTC quote
duplicate and I didn't do it.
OP
@miguel avatar
UTC

Veni, Vidi, Posti
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
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@miguel avatar
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UTC quote
So far there a three different solutions that members of posted, all swearing this is the best. I wonder how you'd do a comparative test?

Suggestions?
Miguel
@fudmucker avatar
UTC

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2021 GTS 300 HPE +2013 GTS 300ie + 294 Polini
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UTC quote
Cost per drop would be a good start!
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UTC quote
waspmike wrote:
I am lucky as I can buy acetone as nail polish remover.
What shade nail polish would recommend.? I tend to go with something to match my eyes.
@waspmike avatar
UTC

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LXV 150 3v ie. Midnight Blue (Sold) Now Honda Zoomer X
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UTC quote
Sledge wrote:
waspmike wrote:
I am lucky as I can buy acetone as nail polish remover.
What shade nail polish would recommend.? I tend to go with something to match my eyes.
I'm an instrument guy so generally I will specify a dab of orange/whatever on adjustment screws as a telltale.
Inst. techs. will all have their own colour, usually.

But nowadays with smart everything there are precious screws left to mark. Even the access covers don't work as parameters can be changed from the control room.
UTC

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2009 Vespa gts250 Super
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@waspmike avatar
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UTC quote
Miguel wrote:
So far there a three different solutions that members of posted, all swearing this is the best. I wonder how you'd do a comparative test?

Suggestions?
Miguel
https://www.jalopyjournal.com/forum/threads/penetrating-oil-showdown.350800/

https://backyardtoolshed.com/best-penetrating-oil/
@fudmucker avatar
UTC

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UTC quote
The jist of the jalopy journal article:

Torque required to remove nut...
Forum member supplied image with no explanatory text
@flordian avatar
UTC

Rocket Man
GTS 300 ABS 'Drake', GTS 250 (sold), LX 150 and Delta IV rocket. ( Retired. Not my problem anymore)
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@flordian avatar
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UTC quote
Fudmucker wrote:
Make your own penetrating oil using left overs.

50% Automatic Transmission Fluid
50% Acetone
Have to agree. We've used this combination for years around some badly corroded situations because of salt environment, chemical and stress corrosion. Some days using a gallon wasn't unusual. Works great without the exorbitant cost of the commercial blends. Keep in mind any penetrant will absorb within your body. Use protective gloves.

On another note, I've used the candle process to remove the most stubborn bolts without the environmental problems.

Bob
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Molto Verboso
2018 Vespa 300 GTS Touring
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UTC quote
Quote:
Make your own penetrating oil using left overs.

50% Automatic Transmission Fluid
50% Acetone
What Fudmucker wrote is accurate. I have used that and it has worked for me.
One thing you should do if you mix your own penetrating oil, acetone doesn't like plastic a lot. Get yourself a metal oil can, put your acetone in it and add the ATF.
I read about how to make ones own aerosol can and will attempt to make one using an old spray paint can a bicycle tire valve.
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UTC quote
^ Acetone only attacks certain plastic as it is sold in small plastic bottle as nail polish remover.

I either keep mine in the same bottle the remover came in or decant it into a small pharmaceutical spray bottle, as I only use penetrating fluid infrequently.

Long term castor oil is worse on plastics than my acetone mix.
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UTC quote
Use a small glass eye drop bottle.
You only need a drop of two around the rusted fastener.
You don't need to spray the whole work piece.

PS - Mr Colman was once asked how he became so wealthy from making mustard. His response was that his fortune came from the mustard left over on the plates after everyone had finished eating.
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UTC quote
Fudmucker wrote:
Use a small glass eye drop bottle.
You only need a drop of two around the rusted fastener.
You don't need to spray the whole work piece.

PS - Mr Colman was once asked how he became so wealthy from making mustard. His response was that his fortune came from the mustard left over on the plates after everyone had finished eating.
Hahaha. My father used to tell me that Heinz make their profit from the sauce left on the plate. Probably a dig at my brother and I for not being quick enough with righting the bottle.

I use the mini spray for penetrating fluid as that is what I had. I like to adapt what is available locally to suit my needs.
OP
@miguel avatar
UTC

Veni, Vidi, Posti
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
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@miguel avatar
2009 GTV250 (Gone), 2003 Inder trailer (also gone), 2001 BMW R1100RT
Joined: UTC
Posts: 5707
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UTC quote
Fudmucker wrote:
The jist of the jalopy journal article:

Torque required to remove nut...
Fudmucker. Thanks for the list. There alternatives to the ATF? I NEVER use ATF so never have any around. Can I substitute oil for ATF for example? I truly have no sense of the history involved. I do have acetone as its useful for all sorts of things.

Best Miguel
@web-tech avatar
UTC

Veni, Vidi, Posti
2008 MP3 500, 2013 BV350, 2020 Vespa Sei Giorni, 2008 Vespa S150
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Veni, Vidi, Posti
@web-tech avatar
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UTC quote
Ape wrote:
old as dirt wrote:
There simply is not a better product for rusty bolts.

Sir you have not used a product called Hilco. We use it at work and it will get any bolt loose. It wicks deeper into threads than anything I have ever seen. Give it a shot if you ever run across it, may change your world 🤙
Do they have a money back guarantee? If Aero Kroil doesn;t work they will give you your money back.
@waspmike avatar
UTC

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LXV 150 3v ie. Midnight Blue (Sold) Now Honda Zoomer X
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@waspmike avatar
LXV 150 3v ie. Midnight Blue (Sold) Now Honda Zoomer X
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UTC quote
Miguel wrote:
Fudmucker wrote:
The jist of the jalopy journal article:

Torque required to remove nut...
Fudmucker. Thanks for the list. There alternatives to the ATF? I NEVER use ATF so never have any around. Can I substitute oil for ATF for example? I truly have no sense of the history involved. I do have acetone as its useful for all sorts of things.

Best Miguel
I had the same problem I "borrowed" some from a neighbor. Only about 50cc or less.
@jimjar avatar
UTC

Hooked
2012 LX150ie
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Location: Austin Texas USA
 
Hooked
@jimjar avatar
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Location: Austin Texas USA
UTC quote
If you only need a few drops of atf
You could wipe some off a car transmission dipstick.
@fudmucker avatar
UTC

Ossessionato
2021 GTS 300 HPE +2013 GTS 300ie + 294 Polini
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@fudmucker avatar
2021 GTS 300 HPE +2013 GTS 300ie + 294 Polini
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Location: Pretoria, South Africa
UTC quote
Miguel wrote:
Fudmucker. Thanks for the list. There alternatives to the ATF? I NEVER use ATF so never have any around. Can I substitute oil for ATF for example? I truly have no sense of the history involved. I do have acetone as its useful for all sorts of things.

Best Miguel
You local auto repair shop will have used bottles of ATF in their waste bin.
Each bottle will have a few drops of ATF left in them.
Ask if you can have them and cut them open to drain the last drops.
You need so little that even 25cc when mixed with the acetone will be enough for years of DIY use.
Otherwise, go buy the smallest bottle of ATF and acteone in your local auto supply / hardware store. It really won't break your piggy bank...!
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et4
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UTC quote
Having a 36 year old VW i swear by Plusgas.
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