Oil Leak
 

Looks like it is leaking betweene the head and block on pass side 2003 4.0L is this a normal leak or is the gasket blowen? is not running hot and it does not seam to have any power los frist Jeep os i'm lerning about 4.0L now. as i go.

No leaks are 'normal'.. if oil is coming out from under the head, it's most likely a leaky head gasket. Clean it real good and make sure it's not the valve cover leaking and running down.

Thanks for the in put.

Most likely the oil filter adapter or the "elbow". That sits on the passenger side and a little leak can spray oil everywhere when driving. Prone to leaks and a pita to change the o rings in them.

My standard response:

I'd be looking up above first. A leak at the back of the valve cover could produce the same symptoms. Don't jump on the RMS/oil pan gasket bandwagon just yet.

Almost any oil leak on your 4.0 is gonna drip from the RMS area for 2 simple reasons. First off, the engine sits nose-up and oil will run back to that area. Secondly, the RMS area is also the lowest point on the engine. Simple physics and the old plumber's adage apply here. "$hit flows downhill".

Valve cover gasket, oil pressure sending unit, oil filter adapter seals and distributor gasket have to be eliminated as possibilities first.
Revised 3-23-2012

Agreed, it happened on my '98 XJ and once i replaced the gasket on the "elbow" it was all fixed. Also if it is a small leak you could try looking at the sending unit and see if it is leaking from there..just a thought.