REMOVAL & INSTALLATION
See Figures 1, 2, 3 and 4
Remove the wing nut, or unhook the retaining clips on top of the cover. On the 4.2L engine, detach the rubber hose from the engine rocker arm (valve) cover and set the cover aside, being careful not to damage the large diameter hose or hoses to the air cleaner inlet.
If the filter element has a foam wrapper, remove the wrapper and wash it in detergent or a safe solvent. Squeeze and blot dry. Wet the wrapper in engine oil and squeeze it tightly in an absorbent towel or rag to remove the excess.
Clean the dirt from the paper element by rapping it gently against a flat surface. Replace the element as necessary.
Clean the housing and the cover. Replace the oiled wrapper, if any, on the element and reinstall the element in the housing, placing it 180 degrees from its original position.
The oiled foam wrapper element is a factory option for some years. It should be available through Jeep parts. There are also aftermarket variations on this, both dry and oiled.