i really have to chime in on this thread b/c im a break-in nazi. EVERYTHING with moving metal parts has to be broken in. there is a reason for this. metal is like every other material, it expands and contracts based on it's tempurature. hotter=expanding, colder=contracting. the reason they say to do heat cycles is b/c you want the metal gears to heat up and allowed to properly expand and contract to ensure the strenth of the metal. heating them too much and for too long on brand new metal is bad b/c they might crack. the metal hasnt been "treated" yet. same thing with a new car. the metal in the engine; bearings, races, rods, pistons-they all need to break in easily by allowing to expand at higher temps and contract at lower temps. this is not
, this is an actual science. in my engine building class one of my fellow students (who happens to drice a riced out civic-go figure) mentioned somthing about not having to break anything in and my instructor just laughed. then he proceeded to explain the science of treating metals for ~ half an hour. i didnt take notes, so half of it was forgotten. point is, EVERYTHING WITH MOVING METAL TO METAL PARTS NEED TO BE BROKEN IN.