RE: removing crankshaft sensor???
dual or single cam? alot of times the oil sending can be the cause of a rear leak....
try jacking up the front of the vehicle and putting stands under to prevent it from falling, take a flashlight and look just above the oil filter, thats where the crank sensor is, and about a foot to the left is the oil pressure sending unit... look around and give it a full look over is theoil coming from higher up? could it be a headgasket??
usually the crank sensor is 1 10mm bolt and a lock clip for the plug, then its just a lil twisting and pulling to get it out..... dont pry too hard you might break the sensor off in the engine which = a bad situation
if your oil sending unit it takes a special wrench to get it out