alli can say is make sure that your useing the right run aka breakin method so that you arent causing massive stress on the conrod.
go to rc universe and you ll find a article which will explain how to break in the V-spec or any engine for that matter.
make sure that you run the engine on the rich side to lubricate the bearings and the engine in general not too rich though help from others if needed is a good idea(some one that knows how to tune well.
use aluminium foil around the head to aid in engine temp increase
use a good hair dryer or heat gun to heat the engine to right temp.
use a temp gun to help in knowing what temp the engine is at.
always Pre heat the engine so that it doesnt have such a hard time running.
after each tank make sure that the piston is at bottom dead center so that it does not get stuck at the top
let the engine cool and then do the same, heat up and then start it for another 3tanks and after that you should be running it at the track and tuneing for race use( not at fast pace as the engine is still running in).
please do read the artikle, this info is only from what i recall and i believe its 99% right but confirm this via the breakin artikle in RC universe.