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Aerokroil is the best I have used. I have also had good luck with oil of wintergreen.
i can't get the O2 sensor out of my 92 Mitsubishi Galant...think oil of wintergreen will do the trick? if i can't get the sensor out still, if the OoW gets on something it shouldn't (sensor, etc) will it damage it?
I will only use Howells now-it makes PB blaster seem like water. You can get it on a lot of tool trucks or any TA truck stop. It smells minty it may have wintergreen oil in it
well I just read another thread about wintergreen oil, and apparently its very toxic, which doesn't make sense to me. I thought wintergreen would be safe. Howells has a big label that says non-toxic I guess it doesn't have wintergreen oil in it.
I have had such success with Liquid Wrench that I have not tried all the others. But, if time is of the essence, the candle trick is quicker.
Also, in conjunction with penetrant, shock speeds the process. (tap on it with a hammer, it seems to allow the penetrant to get in more quickly.)
And if it's just a nut or bolt, use a box end wrench and apply pressure to undo, while tapping on the box end. It works great, I have a lot of scarred up wrenches from the process, but rarely do I have scarred up knuckles.
I prefer the PB blaster. Several days ago I read a horror story about a thermostat housing bolt breaking on an aerostar, and I had to replace mine,so I used the PB blaster and carefully removed the bolts, One was very tight but THE PB BUSTER let me remove it, I sprayed and rocked it back and forth till it freed up
PB Blaster used by the dozer mechanic for the John Deere, he got me started on it and It Is Great. The label looks like a "But Wait!..." commercial lol.
Have a gallon of Aero-Kroil, still use it too.
Good 'ol WD-40 if I want to leave a coating on something.
HotWrench usually works if nothing else does, like ya' said. Or break it ugh.
I gotta give a plug to the Kroil made by Kano. I have used the stuff for close to 30 years and I don't think it has ever failed. I like it a lot better than the PBB. I use the regular stuff, never even knew about the Aero Kroil.
http://www.kanolabs.com/
Me and a coworker used a little of it to get some 111,000 mile O2 sensors out of his Taurus last week and they came right out. We prelubed them for a couple days ahead of time.
The stuff does have a slight odor that is pretty persistent but I actually like the smell - brings me back to the old days, if only in my mind.
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