Originally Posted By: dnewton3
Looks very good! Do a few more; see what your trends and averages are. You can probably extend your OCIs out to improve ROI.
Curious about other maintenance done, such as the EGR, oil cooler, etc?
I thought about going to 7500, I'm just wondering how much shear I can get away with. As you know, the HEUI system is very needy of oil in tip top shape. I'm still on the stock injectors, HPOP, and lift pump. The truck runs new and starts immediately. Most cannot say that for a 6.0 with 175k miles. I dose my fuel with Optilube XL as well.
I actually had a small leak in the head gaskets during this OCI which I assume the extra Sodium came from. I'm assuming the Potassium in the Archoil masked the true Potassium levels from the blown head gasket. Truck would eat coolant when pushed hard. I've had head studs since around 90k miles on the truck, but they were incorrectly installed. We were able to take the nuts off the studs with a 3/8 air ratchet with no effort. We just installed new O-ringed heads from UCF with upgraded valve train since I knew the gaskets were done. The original heads looked extremely clean as if they were new along with the injectors. Cylinder bores looked almost new as well. I am extremely anal when it comes to maintenance on this truck. I overhauled the entire cooling system at 150k miles with hoses, thermostat, billet water pump, manual fan clutch, and radiator. I've also run a coolant bypass filter since 50k miles and CAT EC-1 ELC coolant along with an EGR delete. My coolant/oil temp deltas are less than 5 degrees and I have been running the same oil cooler since 60k miles.