The factory service manual for the KJ Liberty says you have to remove the engine to remove the oil pan. The other repair manuals have some poppycock about lifting the engine.
NOT ONE BIT OF THAT IS NECESSARY!!!
Here are the steps for removing the oil pan the easy way:
1. Raise the Jeep and drain the oil.
One other tip: carefully tie the transmission cooling lines back out of the way. You can only get about an inch by doing so, but it will make a BIG difference.
2. If you have a 4 wheel drive model, you probably have to remove the front axle assembly
3. Remove the transmission support bracket at the back of the pan
4. Remove the bolts for the pan ( note the locations of the studs if any ).
5. Separate the pan and gasket from the block.
6. There are two nuts and one bolt that have to removed under the oil pan. They hold the pickup tube and splash pan in place. The splash pan is attached to the gasket.
The can be seen in these pics here ( relevant parts are circled in red ):
Here is a view with the oil pan removed so you can see what is actually going on.
Once the bolts and nuts are off, just let the pickup tube fall into the pan. You’ll remove all three, the pan, pickup tube, and splash plate/gasket assembly. They will have to be put back in together as well.
7. Now the tricky bit: To get it out, turn it so the thin part is facing the passenger side and slide it between the engine and the support beam, now wiggle it forward and it will come out. It might take some wiggling, but it will come out.
Here is a video showing how it can be done:
Installation is pretty much the reveres. But a couple of tips:
When putting it back together, put a few bolts in the gasket to hold it in place, the put the two splash plate tube nuts ( again reaching inside the pan ) on but loosely until you get the pick up tube bolt fully installed.
Also make sure you follow the repair manual on where to put the RTV ( it doesn’t go all the way around ) and the torque specs for all the bolts. And make sure you put the bolts with the studs back in the correct places.
Hopefully this little guide will save someone a lot of time and/or money. But having said that, the standard disclaimer applies. I take no responsibility for you success or failure in this procedure, and if you hurt your self, someone else, or you Jeep, I assume NO responsibility .