I have a 2003 F350 with the 6.0l. No modifactions done. I have done alot of top end work in the past however I cannot seem to cure an oil leak. It appears to be coming from the driver side mid point of intake gasket. I was told that I may possible have excessive back pressure. If that is true, what could cause it? Bad rings possibly? Thanks

 

that is where the vent comes out of the valve cover, there is a tube that goes from valve cover to the intake tube that goes to turbo. that hose might be off the valve cover and it will oil up the whole area, it is basically the PCV valve for a diesel, that is also why you get alot of oil in the cooler tubes

 

I'm familiar withe the hose you're referring too however I am loosing enough oil as to where it is leaving a puddle under the truck. It appears to be running from the intake area, down the head, down the valley around the bell housing and on the floor. I have already replaced upper and lower tower gaskets, cylinder head gaskets, all the seals and O rings on top to include the injector seals. IPR is new.

 

Well there isn't really any oil passing through the intake manifold so there is no reason for oil to be coming from there. Maybe try getting some pictures of this...?

 

Its either the turbo feed line, turbo return tube, oil cooler/filter housing, ICP sensor=very possible, or the IPR oring.. if it was the turbo feed line the turbo would be wet, look for it in the dark and use a bright flashlite, makes it a little easier to spot , your eyes focus on a smaller area.