N14 injector problems

I did a complete o/h on a n14 c+ around 2 years ago. It has gone through at least 3 sets of injectors and probably threw a rod today. This was a no expense spared overhaul literally every moving part was looked at and had new crank and cam injectors and everything else typical of an out of frame overhaul. My understanding is that the last injector failure destroyed one hole. I did not see it and it was done by another shop because the truck has changed hands. Now unfortunately it was purchased by a friend of mine about a week ago and something let loose on him today that caused oil to leave the engine and makes really bad noise when he tried to restart it. I am wondering if it ended up with a bunch of fuel in the oil and caused a bearing failure. I guess the bottom line of this long story is does anyone make a reliable injector for these engines at this point. Most of the injectors were replaced because of missing at low load/rpm but probably 5 total had more serious failures
This is all in approximately 350k miles. I even paid the freightliner shop to put a new set in it which seems to have turned into a smear against me because I apparently don’t know how to run the overhead and set injectors but the set they put in has had at least as much trouble as the ones I’ve done.

 

I didn’t install a recon engine I built it in my shop with mostly cummins parts. I would agree that their engines are rebuildable but pretty much all heavy diesels are.

 

I will try to find it. warranty…yes most of the injectors were replaced under warranty and some were paid for others not. I don’t know what I want to do about warranty on the engine because I highly suspect it’s got something to do with the last guy that touched it especially since it was I believe in the last few thousand miles.

 

Probably 10 but I am not certain and obviously can’t control what my customers do after it leaves
I honestly think most of the failures have been on the electrical side and not mechanical