Oil but no presure
Here is the story on this truck, it was driven with a blown head gasket until it became a no start. Replaced gaskets, ARP studs, new oil cooler and EGR delete. drained 6.5 gallons from the crank case. Contents of the cooling system. The truck was still a no start. I had no HPO. I did find a bad HPOP and replaced it. No Start. Started to dig deeper and I have found that I am getting oil filling the filter housing but I have no oil pressure on the low side. No oil is getting to the pressure sensor. I am getting a light flow of oil from the turbo supply line but has little to no pressure. Any suggestions would be very welcome at this point.