My c15 rebuild

[Brock]

Here is my 2008 cat c15 being tore down. Engine had so much blowby that it was blowing oil fill caps off and loads of oil flying out of the blowby tube. We assumed wed see broken rings but we didn't, what we saw was number 3 and 4 (mostly 3) the liners were so very badly worn and the skirts on the piston as well. Looked like the rings were digging into the sleeves.

Heads cracked as well, cam is not the greatest.

Mechanic figures the damage is due to constant lugging of the motor, I usually drive my prostar so I can't speak to that but I'm wondering about bad timing in the tune. Getting it over to unilevers after its done anyways.