Originally Posted by tbwhit
Uhh you forgot head gaskets etc. Wasn't this made by Navistar? I just know too many people that had these engines and had nothing but problems. Hope you find the problem and good luck to ya!
I had already written so much I didn't want to detail it out that when the oil cooler clogs it causes the egr cooler to burst which then causes to much pressure in the combustion chamber which blows the head gaskets. Ultimately it boils down to keeping a healthy oil cooler. And I explained how to know its going south in my first post.