Ok, I have to ask this ? I am really wanting to know what the purpose of the heat cycling the engine several times before you even start your motor for break-in, I keep seeing several say you must do this, but I have not seen an explanation for this. I under stand heat cycling a motor during you break-in(running your motor at operating temps at x amount of time then shutting down to let cool. This is so that the run in will marry the parts to each other (piston,sleeve,rod & crank). I just don't understand why you are heating a engine up to 200* then cooling it off several times before u ever start the motor. If you guys are talking about strengthening the metal, then you are wasting you time, you have to get the metal at a temp that you can not achieve with a heater/heat gun. So please explain the purpose of this!