It was overheating too?
If so are you sure it wasn’t just gunked up with 20 year old antifreeze goo?
I drove a fair number of 6.0no trucks back when they were new, in AZ of all places for a couple years, didn’t have cooling issues. Maybe lucky?
The truck has 80k on it. When I pulled the valve covers to do the injectors, it was spotlessly clean inside. This engine has had regular oil changes. It has had the EGR system deleted and a straight right up pipe installed. I suspect due to the cleanliness of the engine, the oil cooler may have also been changed. The oil and coolant temperature gauges show the same temperature which is what you want, indicating a clear unclogged egr cooler. The heater core could also be clogged with contaminants. The old smaller radiator was clearly heavier than the new larger 3 care aluminum radiator. My presumption is the weight of the old radiator was from crud built up inside. So far, results are impressive.
