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There is NO WAY the stud will heat at a differen't rate than the case where they are in intimate contact with one another! The logic that the case will expand more than the stud if one trys to heat just the case is totally false. If the case happens to expand more it would be due to the difference in the coefficient of expansion, NOT the temperature. Thats because the case and stud, where they are in solid contact with one another are at EXACTLY the same temperature, period.
THe whole reason for heating the studs is to burn up the locktite glue that bonds the parts togather. Once the glue is fried, it no longer holds and the stud comes out, that simple. THe heat is NOT to try and make the two metals expand at a differen't rate, cause it ain't possible, where they are in intimate contact with one another. Another thing the heat does, is on a very transient basis, cause the two metals to expand at slightly differen't rates, this difference can also help break any bond that may have formed due to rust or corrosion, but in terms of trying to make one part bigger than the other, no way.
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