Regardless of the test results, Kroil worked well for me on a number of problem bolts on my Atomic Four, including exhaust manifold and head and in getting the engine coupling off the shaft.
And (for reference of our Canadian listserv members) was surprisingly easy to get close to home in Nanaimo: http://www.4gt.ca/kano-laboratories/ or in Ontario: http://www.aircraftspruce.ca/catalog/eppages/aerokroil.php?clickkey=2037461 Peter Fell Sidney, BC Cygnet C&C 27 MkIII From: Marek Dziedzic via CnC-List Sent: Monday, March 09, 2015 11:43 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Tool recommendation 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
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