Update... I found another thread where the suggested test was to pull the oil filter and run a test on the lpop. I ran the test and the lpop is working fine so the problem is hpo related obviously. I'm in the process of going back into the engine. So far the ICP seems fine and the IPR is brand new. The turbo has been taken apart and cleaned prior to installation. However, when I pulled the turbo a few minutes ago to get to the HPOP housing, I noticed fresh oil on top of the engine and oil around the pipe from the HPOP housing to the turbo. I suspect bad O-rings.
Can bad O-rings on the short pipe going from the HPOP to the turbo cause a no start when hot issue?
One other update... after I ran the LPOP test in the filter housing, the long start when cold issue disappeared. When cold, the engine will fire up immediately and run like a top. The problem is only when the engine is hot.
The short pipe you are talking about will not cause a no-start hot. That is simply a oil return line from the turbo, simply dumping the oil back into the engine. The pipe is not actually connected to the HPOP itself, just to the cover. Perhaps you have a bad o-ring that's causing the oil to leak from that location.
Your best bet is to get a hold of an air fittting to performa an air test on your HPOS. There are two kinds of air fittings, one that goes in the place of the ICP (more common), and one that goes in the place of the IPR. I have the latter because I think this is an easier method since you do no have to command the IPR closed in order to perform the test properly. I say get the air fitting first because you will most likely start throwin parts at your truck that may not neccessarily need to be replaced. I have done this and it sucks. Makes more sense to buy a diagnostic tool and use that to find the problem; hence saving you money in the long-run and reducing your overall headache.
Your HPOS leaks could origniate from;
-HPOP itself if you have the early build model
-STC fitting if you have the late build model
-injector to HP oil rail seals
-oil rail to the couplings o-ring (more common that this oring actually goes and then high pressure oil from the rail erodes the seals in the injectors. So if you do have leaks in the injectors to oil rail seals this was most likely caused by the o-rings in the oil rail.)
-various orings from plugs on the oil rail (most commonly do not cause a hot no start)
-incorrect placement of the HPOP itself where the o-ring at the bottom of the pump is worn or missing.
So this is why I say to get the air fitting first rather than throw money at random parts. Hope this helps.