Oil pressure port sealed? Mine is leaking a little and from under the truck looks to be coming from the pan/rear main but hunted it down to leaking fitting on the back of block.
When I first saw the oil on the floor I thought the motor was not venting because I still had the pvc valve in the left valve cover and not connected to anything.How is the engine vented, I use A pvc and circle track style vent on left side valve cover, usually if crankcase pressure is real high it can push the dipstick out, x2 on making sure you accurately identify the origination point for any oil leak.