Well, my gasket catalogs aren't up to date, but: 1930 McCord says tighten all gradually (mfrs chart if available etc)(they actually recommend three circuits to tight!) then "go over...tightening them again after the motor has been run long enough to heat thoroughly." 1939 Victor says: CAST IRON heads: "final tightening ...after motor has been run a few hours and has been thoroughly warmed up. It will be found that nuts can be drawn down further." ALUM heads: "...let the motor run hot (I assume they meant operating temp)and then let it cool. After it has cooled tighten the bolts to the final tension." Cleaning threads is always recommended; some torque lists have different values for oiled and dry threads.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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