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Re: Best rust penetrant?
[Re: ahy]
#1955203
11/21/15 01:03 AM
11/21/15 01:03 AM
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Joined: Jan 2003
Posts: 4,396
The Pale Blue Dot
Skeptic
master
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master
Joined: Jan 2003
Posts: 4,396
The Pale Blue Dot
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I believe the 50/50 acetone/ATF works... that said, how many of us use heat if the fastener won't move with reasonable torque? Hitting acetone + ATF with a torch would be "interesting". It's not that dramatic, it does burn and I'm sure some hamfisted mekanik has burned some car/building/themselves/other. The idea is to gradually build heat, then spray the penetrant. Going back and forth on torque helps too.
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Re: Best rust penetrant?
[Re: McCandlessboy]
#1955307
11/21/15 11:43 AM
11/21/15 11:43 AM
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Joined: Sep 2011
Posts: 1,488
STL
cdstl
pro stock
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pro stock
Joined: Sep 2011
Posts: 1,488
STL
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I've never used Kroil, and probably never will since it's not on a store shelf. I'm sure it's good stuff.
Hands down I will always use the 50/50 Acetone Trans fluid mix. I broke loose 11 45-year old brake line nuts without twisting the line. I can, and will, reuse all of them.
1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500
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Re: Best rust penetrant?
[Re: cdstl]
#1955323
11/21/15 12:33 PM
11/21/15 12:33 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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I've never used Kroil, and probably never will since it's not on a store shelf. Some auto parts stores have it on the shelf, although I have never used it.
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Re: Best rust penetrant?
[Re: DaytonaTurbo]
#1955361
11/21/15 01:35 PM
11/21/15 01:35 PM
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Joined: Jan 2003
Posts: 16,010
Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,010
Omaha Ne
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we've tried, Kroil, I wasn't impressed PB works but stinks A couple brands of the freeze off by different companies, Rip OFF Liquid wrench so-so A friend at another shop gave me a can of Free all to try and it is the current favorite in the shop. it has consistently worked where others did not. it is not readily available so I buy it online by the case http://www.alliedelectronics.com/FS16.html 
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Re: Best rust penetrant?
[Re: McCandlessboy]
#1955401
11/21/15 03:12 PM
11/21/15 03:12 PM
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Joined: Sep 2011
Posts: 1,488
STL
cdstl
pro stock
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pro stock
Joined: Sep 2011
Posts: 1,488
STL
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I had to remove the pitman. I removed the nut and got all of the rust and grease off of the splines so the the Acetone mix could penetrate. I was careful not to squirt the stuff everywhere because I wanted to see how it would go through when I squirted it on the nut side. After about a half hour the stuff started running out of the bottom side towards the steering box.
1972 Cuda 340 4 speed, 2001 Ram CTD 4x4 6 speed, 1970 Duster 408 4 speed, 1996 Ram 5.9 2x4 auto, 1965 Coronet 500
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Re: Best rust penetrant?
[Re: McCandlessboy]
#2618588
02/08/19 10:38 AM
02/08/19 10:38 AM
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Joined: Feb 2010
Posts: 1,645
Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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This is a followup to the article Dogdays posted. I've highlighted the things I think are helpful clarifications. Machinist's Workshop V20 number 2, April/May 007, page 35
Article: “Testing Penetrating oils”
This reports a test of penetrating oils where they measured the force required to loosen rusty test devices. The details reported here were validated by the original article author. He also added some details on the methods.
You must buy the issue if you want to see how they did the test. The back issue is available for purchase.
The table below extracts the results table The lower the number of pounds the better. Interesting that a simple mix of acetone and power steering fluid (PSF) works the best!
Penetrating oil Average load Price per fluid ounce
None 516 pounds
WD-40 238 pounds $0.25
PB Blaster 214 pounds $0.35
Liquid Wrench 127 pounds $0.21
Kano Kroil 106 pounds $0.75
PSF-Acetone mix 53 pounds $0.10 (50/50 mix)
Notes from original article author:
1) These are loads required to free the test piece after 8 hours of immersion in penetrating oil. This is probably not representative of a quick squirt just before a wrench is applied.
2) The original article states ATF was used in the DIY mix. It was actually PSF. I corrected the table to reflect this.
© Copyright 8 February 2008, 63Avanti@sterkel.org
Permission to print and post on the internet in this form received from the author
8 February 2008 Avanti.org is gone.  Maybe its been saved in archive.org I haven't looked. There are various power steering fluids so we can only guess that the one used was one with low viscosity and high detergents.  My own experience has been that PB Blaster is good when applied the day or days before. Even better reapplying each day. I like it for situations where impact is not possible or seems inappropriate. Removal usually requires slow steady force. Stuff doesn't 'break free' but feels more like a fastener with interference fit. Kroil seems better for last minute use. Sili-kroil seems to help more in making it easier to turn once the bolt has broken free. I agree with those that like the sprays specifically for freeing equipment
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Re: Best rust penetrant?
[Re: homemadetools]
#2618657
02/08/19 01:21 PM
02/08/19 01:21 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Hey guys - we have a new free ebook of homemade car tools: Good info, (much) appreciated!
live every 24 hour block of time like it's your last day on earth
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Re: Best rust penetrant?
[Re: McCandlessboy]
#2618679
02/08/19 01:57 PM
02/08/19 01:57 PM
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Joined: Aug 2004
Posts: 3,401
cheshire, ct
davesmopars
master
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master
Joined: Aug 2004
Posts: 3,401
cheshire, ct
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I use Seafoam Deep CreeP for years one of the best I think
Last edited by davesmopars; 02/08/19 02:14 PM.
Keeper of the 440 M code Cuda registry
mcodecuda@yahoo.com
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Re: Best rust penetrant?
[Re: davesmopars]
#2618695
02/08/19 02:33 PM
02/08/19 02:33 PM
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Joined: Jan 2003
Posts: 5,367
Rancho Cordova, California (Sa...
hemi71x
master
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master
Joined: Jan 2003
Posts: 5,367
Rancho Cordova, California (Sa...
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I use Seafoam Deep CreeP for years one of the best I think I bought a can of that last month, to give it a try, as it's available locally, at pretty much all the parts stores. Kroil, i have to order thru the manufacturer, and now shipping costs make it prohibitive. That Seafoam stuff works well, my two cents on the subject.
RF-4C Phantom 69-370 Zweibrucken, Germany
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Re: Best rust penetrant?
[Re: McCandlessboy]
#2618699
02/08/19 02:41 PM
02/08/19 02:41 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Kroil - free delivery with Prime
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Best rust penetrant?
[Re: McCandlessboy]
#2618712
02/08/19 03:13 PM
02/08/19 03:13 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Pays for itself real quick. But to each it's own
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: Best rust penetrant?
[Re: McCandlessboy]
#2618760
02/08/19 04:30 PM
02/08/19 04:30 PM
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Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
master
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master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
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If you want good quality stuff, go to a real hardware store, not home depot or lowes, Autozone, Advanced or Oriellys.... I use Grainger, Industrial Supply, Marshall's Industrial Hardware, Fastenal...McMaster Carr for mail order. Most of the chain auto parts stores do not have quality anything hardware/chemical wise typically unless they get it at a price point that they can make an uber profit.
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
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Re: Best rust penetrant?
[Re: McCandlessboy]
#2619068
02/09/19 01:42 PM
02/09/19 01:42 PM
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Joined: Jul 2011
Posts: 977
Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 977
Chicago
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Having worked in the automotive chemical industry and having done a lot of testing.....PB Blaster is the best
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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