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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 07-27-2011, 07:31 AM   #1
Jim Murphy
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Rusty Nut Removal Comparison Test

For those of us who have suffered this frustration:

from About.com discussion on removing frozen fasteners.....

Rusty Nut Removal
For those of us who do our own restoration work, here's some interesting comparisons on penetrating oils sent by a friend. Happy knuckle busting!

Machinist's Workshop magazine actually tested penetrants for break-out torque on rusted nuts. Significant results! They are below, as forwarded by an ex-student and professional machinist, Bud Baker.
They arranged a subjective test of all the popular penetrants with the control being the torque required to remove the nut from a "scientifically rusted" environment.

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 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.

Hope that this helps.
Jim
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Old 07-27-2011, 12:36 PM   #2
mletchworth
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Interesting. Hopefully those are averages, and they didn't just use the results of one nut for each product.
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Old 07-29-2011, 05:46 PM   #3
phamine
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I'm surprised. I think pb would be better than liquid wrench.
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