Well it's been almost a year since I made this post on diesel in the engine oil. Replacing the IP seal and rebuilding the IP fixed the problem then. We had a power outage the day before yesterday and I ran the generator for about 3 hours. The only thing I noticed was that it was blowing a lot of white exhaust. When I went to turn the gen set off, there was a "big" pool of diesel under the gen set. It was actually running out of the bottom. I finally got around to checking it out today. I started it back up and there were no obvious leaks. I let it run for about 30 minutes and there was diesel blowing around everywhere. The best I could tell was that it was coming from the front engine bearing area and somewhere around the rear of the engine. I shut it down and checked the engine oil. It was all the way to the top with almost pure diesel. So it looks like I try relacing the IP seal again. My question is, is it worth it? Have I screwed up the crank seals/engine? (Aside from diesel in the engine oil, the engine runs great, even under somewhat heavy loads.