heat cycle method. Preheat to 200 then start it. open the glow plug if needed. do that for about 3 full tanks. I never let my engine idle as it wont seat. You need a load on the engine for it to seat in. after about 20 tanks is when you can lean it out to a race or aggressive tune. After breakin id highly recomend replacing the rod. I myself would switch to ceramics as well but mine already has them.