The water replenishes the level the acid should be at, try to use only distilled here. Be very careful in doing so as well, the sulfuric acid is known for eating holes through clothing and such.
Very true, furthermore did you know you aren't just supposed to go around in a circle, you are always supposed to go to the one across from it next. (almost like drawing a star) I can't imagine him not knowing this, it was probably more so because they don't do it. The vast majority of shops out there take their impact wrench and turn it until it stops, whether you got 100ft/lbs or 400ft/lbs of torque on it.
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