This is from an almost 10-year old test, but it should be still true:
A study done by Machinist's Workshop magazine in their April 2007 issue looked
at different penetrating oils to see which one did the best job of removing a
rusted bolt by measuring the pounds of torque required to loosen the bolt once
treated. If the study was scientifically accurate, it turns out a home brew
works best! Here's the summary of the test results:
Penetrating oil .......... Average load
None ..................... 516 pounds
WD-40 .................... 238 pounds
PB Blaster ............... 214 pounds
Liquid Wrench ............ 127 pounds
Kano Kroil ............... 106 pounds
ATF-Acetone mix.............53 pounds
The Automatic Transmission fluid (ATF)-Acetone mix was a "home brew" mix of 50
– 50 automatic transmission fluid and acetone. Note the "home brew" was better
than any commercial product in this one particular test. Note also that "Liquid
Wrench" is about as good as "Kroil" for about 20% of the price.
Marek
From: robert via CnC-List
Sent: Monday, March 09, 2015 12:20 PM
To: Steve Thomas ; cnc-list@cnc-list.com
Subject: Re: Stus-List Tool recommendation
Steve:
Advice, that from my experience in these situations, I would agree with. If
the bolt won't turn, anything less than a perfect fit will begin the 'stripping
process' which will ultimately make the job more difficult.
David, I have tried this 'home made penetration concoction' with
success......by volume, half and half of power steering fluid and
acetone......and make sure if you try this, it gets on the parts you want
unseized and not on other parts, like hoses, belts, etc. I used an 'eye
dropper' which I found very controllable and exact.....almost no spillage. I
loosen the seized bolts on my mixing elbow and exhaust flange with this
concoction before I got into trouble with , maybe a broken bolt head.
Rob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
On 2015-03-09 11:43 AM, Steve Thomas via CnC-List wrote:
I would NOT try to use an open end wrench of any kind to loosen a bolt that
is really stuck. There is too high a probability that you will just round off
the head and make your task even more difficult. Use some kind of closed
wrench, either the box end of a combination wrench, or a socket, preferably a
six point. From your description it sounds like a socket is out of the
question, which is too bad. I would not try to use any kind of one size fits
all or adjustable for breaking it loose either. I have never yet seen one that
will reliably transmit torque as good as a solid lump of metal.
Once the bolt is broke free there are many options. I like the box end
wrenches that have the ratchet built in, in situations when a socket wrench
cannot be used. They are almost as good as combination wrenches for tight
fitting situations and the ratchet makes them a lot more convenient to use.
Steve Thomas
C&C27 MKIII
----- Original Message -----
From: David Knecht via CnC-List
To: CnC CnC discussion list
Sent: Monday, March 09, 2015 10:12
Subject: Stus-List Tool recommendation
I was at the boat yesterday and tried to take the heat exchanger off the
engine (Universal M4-30) so I could refurbish the seals and make sure it is
clean (http://www.pbase.com/mainecruising/heat_exchanger). One bolt came off
easily but the one on the starboard side is a challenge. I cannot get a socket
on it because something from the engine or transmission is partially blocking
frontal access. I found my wrench selection on board is less than adequate and
I need to upgrade. I tried with a short 1/2" open end wrench and was able to
get it on, but could not budge the bolt. I left it sprayed with penetrant
hoping that will loosen it.
I looked at other wrench types to see what would be useful in this
situation and came upon this ratcheting wrench I had not seen before:
http://www.amazon.com/Alden-Wrench-56038-Ratching-Open-End/dp/B002VEC9XE/ref=sr_1_1?s=hi&ie=UTF8&qid=1425909762&sr=1-1&keywords=alden+ratchet
It looks like something useful to have on the boat as the clamping action
should work on both metric and SAE, it is stainless and it ratchets. Has
anyone tried something like this?
The other type I am considering is the flex head ratcheting wrenches:
http://www.amazon.com/Husky5-Pieces-SAE-Flex-Ratcheting-Wrench/dp/B00CBFVKT2/ref=sr_1_4?s=hi&ie=UTF8&qid=1425910197&sr=1-4&keywords=ratcheting+flex+wrenches
Dave
Aries
1990 C&C 34+
New London, CT
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