CAT C13 Acert KCB, Break in period

hey ya'll,
i just finished doing an inframe on 2007 KCB C13, new injectors and reman head also, started her up yday and only took a little starting fluid but started right up, sounds healthy, no sputtering, smooth idle, no smoke or excessive blowby, i was just wondering the way i should treat it to let everything break in correctly, after turning it on i let it run at around 1500 rpm for about an hour and a half as what i usually do, how long do these usually take to break in and how should i treat it, can i give it heavy loads, should i be worried something might go wrong now even after its on?,what things do i need to look out for? thanks!

 

i wasnt idling tho i was at 1500 rpm for that time to build heat which was i thought it needs to seat everything properly, but yes i understand the engine needs to be under load, so heavy loads should be a good thing for it for now?

 

okay ill give it a heavy trailer to pull, one quick question, ya know the valve spacer cover that goes in between the head and valve cover? well, the bolts for the valve cover just spin in the spacer, so i used a heli coil thread kit and got them to tighten up but i still got a leak towards the rear of the engine, the isolators and gasket are new, any ideas on what i should do, do i have to have the spacer machined or something? thanks

 

what do ya think would happen if things didnt seat right? high oil consumption or what?

 

its only my second rebuild, im only 19 lol first one i did was a cummins isx and that one still runs great so i got hopes for this one, knowledge like break in comes with more experience which is why i come here