I have not posted any pics lately because of a small snag. One of the engine studs that holds the cylinder jugs is stuck. Really stuck. I have tried all but one trick. Before I taunt anyone with what I am going to do, I did a little searching and found a big pile of garbage knowledge. That is someone suggested soaking an aluminum casing with a stuck steel stud in a nitric acid bath; "it won't hurt the aluminum" he write. NOTICE: Nitric acid will dissolve aluminum. IF you put aluminum in a strong nitric acid bath, you will not only dissolve the casing, but create a redish color toxic gas, inhale that and you could possibly be taking a dirt nap.
Having said that, I know from my own experience that a weak phosphoric acid solution does not harm aluminum too much. It basically turns it black from leaching the zinc from the alloy. This evening my engine case is soaking. If that does not work I will:
Chill the steel stud to -130F while warming the case to 180F....at the same time.
...I will explain how i did it after it works......
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