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Thread: Best stuff for breaking loose bolts

  1. #1
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    Best stuff for breaking loose bolts

    This info should be stickied or something. Cool little study, going to have to try this ATF/Acetone mix.

    Rusty bolts? Make your own super rust penetrant!
    Suggested by John Brown
    So you deal with a lot of rusty nuts? Go down to the hardware store and buy some acetone, a quart of Dexron Mercon and a refillable spray bottle. In the spray bottle mix the ATF and acetone in a 1:1 mixture.

    Spray away and get your nuts loose!

    Independent testing of penetrating oils using a single steel bar with 1/2”x20 nuts torqued to 50 ft/lbs and treated with a 10% salt water solution that was allowed to rust. Listed are the chemicals and required removal torque.

    -None ………………… 516 pounds

    -WD-40 ……………… 238 pounds

    -PB Blaster …………. 214 pounds

    -Liquid Wrench ….. 127 pounds

    -Kano Kroil ………… 106 pounds

    -ATF-Acetone mix….53 pounds
    http://grassrootsmotorsports.com/tech-tips/55/
    Tony M.
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  3. #2
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    I'm definitely going to have to try that mix out. PB Blaster doesn't seem to do much most of the time. I've gotten in the habit of anti-seizing everything now, stinkin rust.
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    Not A DSM verified Feedback Score 3 (100%) Polygon's Avatar
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    I wonder how long they let them sit before trying to break the bolts loose. PB Blaster worked A HELL OF A LOT better for me than Liquid Wrench. WD-40 should just be sold as a lubricant, it's worthless for breaking anything rusty free. I didn't know about the Acetone/ATF mix. I'll have to try that next time I've got a rusty bolt. Wish I had known about that last fall.

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    Hrrrmmm....wonder what the concoction smells like? PBBlaster smells like A$$

    Thanks for sharing!!!

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    rawr. verified Feedback Score 4 (100%) Atrosity's Avatar
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    Good leverage always does the trick.

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    I was going to say, I've only had one nut I couldn't get off with PB Blaster. Doesn't mean I wouldn't have liked help on the other bolts/nuts though, haha.

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    I typically use the cheap penetrating oil. If that doesn't work I use a bigger wrench/breaker bar. If that doesn't work I get the torch out. If that doesn't work I get a cutter out.

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    Not A DSM verified Feedback Score 3 (100%) Polygon's Avatar
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    Quote Originally Posted by Atrosity View Post
    Good leverage always does the trick.
    Or snaps the head off.

    Quote Originally Posted by Maximal View Post
    I typically use the cheap penetrating oil. If that doesn't work I use a bigger wrench/breaker bar. If that doesn't work I get the torch out. If that doesn't work I get a cutter out.
    Yep, been there done than. Nothing like rust welded bolts holding the LCA to the subframe.

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    Quote Originally Posted by Polygon View Post
    Or snaps the head off.
    Probably the reason why my wheel stud is snapped.

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    Quote Originally Posted by Polygon View Post
    Yep, been there done than. Nothing like rust welded bolts holding the LCA to the subframe.
    That's why I include new bolts with my control arms...every car I've ever isntalled control arms on have had the stock bolts rusted into the bushigs. A saws-all between the bushing and the bracket is the easiest way to get them off.

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