Most common problems with 4.0L and 4.7L jeeps. From my experience owning two WJ jeeps. 1. Oil leaks from rear main seals, valve covers and oil pan. High mileage oil seems to help. Rebuild with new gaskets. 2. Burns oil at higher mileage. High mileage oil and or thicker viscosity oil seems to help.
11) Carefully reinstall the radiator/auxiliary cooler/condenser/shroud assembly into the Jeep. a. Make sure to line up the rubber alignment dowels into the lower radiator support. 12) Reinstall the upper radiator hose and clamp at both ends. 13) Reinstall the reservoir hose to radiator filler neck. I would dump the crankcase quick and use a good 10w30 dino oil, like Havoline for example. Great oil analysis results witht the I-6's and this stuff. Run a bigger filter too, like a Donaldson 550299, 6.75-7 quart crankcase capacity. More oil the better. There are many causes of the P0456 small evap leaks. If you’ve found no leaks with a smoke machine test the purge solenoid. Make sure it holds vacuum. Another common failure if the ldp ( leak detection pump) the filter that connects to the ldp pump gets full of dirt. The first will eventually get passed the filter and get into the pump andHis: 2004 WJ - OME HD 'Kolak' Lift - Build Thread His: 1979 J-10 - 3" on 33s - Build Thread His: 2009 Expedition His: 1978 F250 Custom - Build Thread Hers: 2000 TJ Hers: 2010 Jetta
Looks like the timing cover/front crankshaft seal might be leaking a bit. Its fairly safe to say that the oil pan gasket is also leaking. It looks like at some point in time, someone has been inside the engine, as the red RTV is not supposed to be there. The oil pan gasket on the 4.7 is a steel gasket coated in rubber with a built in windage tray.
AmP5D.