My Cherokee shows excellent oil pressure.. but after a 30 mile trip on the highway.. the oil pressure drops to near Nil at idle ? Either a lifter will chatter, or a knock can be heard lower down in the engine. Oil Pump.. or worse..'Main Bearings' ? Also.. how do you change the Lift Gate Air Cylinders.. I pried the old ones off.. they have to be 'Beat On' ? Or is there a trick to it ?
Feb 12, 2010 at 10:10 AM

