So I purchased my 04 RC earlier this year and it was obviously not treated correctly in the past. It seemed a bit sluggish IMO and over the past year I've been trying to do some routine/preventative maintenance. I just spent the last 5 months deployed and recently got back and went to take care of some things. I had ordered the demon coil packs, venom wires, plugs, and other misc things throughout the truck. Now here's my issue. When I had pulled #9 plug, it was completely soaked in oil. I noticed a good bit of oil from around where the valve cover meets the head so I replaced both valve cover gaskets. I put it all back together and it sounded like the truck was misfiring like no other. I verified the plug wires were fully seated and in the correct location and still no luck. I had been told that the demon coil packs were prone to that issue so I just went and got replacements from O'reilly's. I swapped them out and everything seemed to be good except the idle was a little rough and I could hear what sounded like a vacuum leak. Sure enough the elbow coming off the driver side valve cover was split. After replacing that, it still had a rough idle but after a few seconds, I could hear a faint squeal that gradually got louder and louder almost like a bearing on a pulley. Shut it off, checked around and couldn't find anything. Cranked it up again and same issue. A buddy of mine just happened to pull the dipstick a few inches out of the tube and the noise stopped and idle went back to normal. We verified that a few times just to make sure it wasn't coincidental. At this point I'm at a complete loss as to what to look for or what could be the issue. I'm thinking it has excessive crankcase pressure which sounds costly.