Originally Posted by DFlintstone

Don't waste your time with one of those universal kits from the auto parts.

Is there a Crown Kit for HO's? If you have a dealer near you might check them. Anyway, here's the sizes>

91-01 HO Model O-rings

0.676 x 0.070 AS568 size -017
0.859 x 0.139 AS568 size -212
2.484 x 0.139 AS568 size -230

Originally Posted by cruiser54

I'd be looking up ABOVE first, and VERIFYING the source of the oil leak YOURSELF.

Everybody, who doesn't own or have to pay for or perform your vehicle repairs, loves to poke their noggin UNDER the Jeep and come out bearing the false bad news that your RMS is leaking.

Many mechanics, friends, people on Jeep forums who can’t see your Jeep from where they’re at, and good old Uncle Bob seem to enjoy telling you it’s the rear main seal. Has a catastrophic ring to it, doesn’t it?

A simple leak at the back of the valve cover or other source could produce the same symptoms. You don’t need to be a mechanic to figure this out. If you have good eyesight and a dim flashlight, you’re good to go on your own. Don't jump on the RMS/oil pan gasket bandwagon right off the bat.

Almost any oil leak on your 4.0 is gonna drip from the RMS area for two simple reasons.

First off, the engine sits nose-up and any oil will run back to the RMS 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, in that order, have to be eliminated as possibilities first.

Revised 02-26-2013

Originally Posted by frado2jr

Isent it just a simple ring inside a gasket? Dont wannt wait in the part when I just wanna pick it up

Originally Posted by cruiser54

NO. It's 3 o-rings.

Originally Posted by frado2jr

Ive been checking inline and i found this
http://m.oreillyauto.com/mt/www.orei...4709&ppt=C0023