well, sir im definitely no pro. I recently had something happen to me, although not with the large oil leakage. My 06 6.0l was becoming longer and longer on starting. I continued on driving it thinking nothing of it. My wife took the truck to louisiana and said that it was becoming longer and harder to start, although she thought nothing of it as well. She started it bone cole in the morning and drove it home and said it drove fine until she turned it off at a local restaurant. When she went back out to fire it up, it would not start. The truck tried to turn over but wouldnt ever fire on up. I had it taken to a friend of mine, who is a great powerstroke diesel tech. He told me that it had an oil leak in the valve and regulator that led from the high pressure oil pump. He also indicated that an o-ring or seal of some sort was largely gone thus resulting in a loss of pressure in the H.P.O.P system. He told me that he put a ford kit that contained a new valve, regulator, and feed tube back into the truck. I too noticed a small bit of oil near the rear of the engine. Ill try as best i can to articulate what was told to me. So if youre knowledgeable please correct any wrong points i may talk about here. Im merely trying to help.
The explanation for the no start was described to me as follows: The engine starts easier before the oil is heated up because of the high pressure oil pump system that engages the injectors hydraulically. The oil is thicker and has better viscosity to meet the pressure requirements to get the injectors to fire off. Once the truck is running, the hydraulic pressure inside the engine is enough to keep it running but once its turned off, it wont generate enough pressure to get it started again until the oil cools back down and is cold enough to thicken up.
I was told before the repair that one of the following was the problem:
1) high pressure oil pump needs replacement
2) hpop components need to be replaced- i.e. valve, regulator, seal, feed tube
3) bad injectors
4) fuel pump
5) fuel system control module
based on what youve told me it sounds terribly similar to my ordeal. I would say that problem #'s 1 or 2 are what youre probably looking at. I can tell you that before i consulted a very good friend, the nearest ford house was going to charge me 1100 dollars to fix only problem #2 on the above list. It ended up costing me 800 dollars to fix #'s 2 and 3 which was supposed to cost over $3000
needless to say i am all smiles because now my truck runs like it never has. I noticed that the truck starts immediately upon turning the key. Its absolutely amazing how much difference there is. Ill also tell you that my tech guy said a reflash of the computer system after these repairs is an absolute necessity. Not sure why, but thats what he said. This guy is reputable, he's been working on powerstrokes since the original 7.3l diesel was introduced. I trust him entirely. Good luck sir