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Unholyskorn86 05-12-2010 12:38 PM

Oil Pan Replace
I was wondering if anyone had a write up or something with pictures of how to replace my oil pan. My jeep is a 1999 Jeep Grand Cherokee Laredo L6 4.0L.

Mine is leaking and I would like to replace the pan and gasket. Not sure what I have to move etc tho.

Thanks for the help!

Chaoul1 05-12-2010 04:21 PM

Re: Oil Pan Replace
1.Drain the old Oil First.
2.Unbolt the Oil Pan
3.Once the Oil Pan is off make sure the gasket is off
4. Have new oil pan ready with new oil pan gasket
5. Bolt back up and add new Oil

Unholyskorn86 05-12-2010 05:08 PM

Re: Oil Pan Replace
There is nothing I have to move? Could of sworn it was more complicated then that...

Chaoul1 05-12-2010 05:24 PM

Re: Oil Pan Replace
1.) Jacked up the front, put it on jack stands (only have 1 jack) and let the suspension hang as far as it could.
2.) Unbolted the oil pan and slid/twisted it toward the drivers side so that I could get at the oil pickup.
3.) Removed the long bolt that holds the oil pump and oil pickup to the block. Removed the oil pickup.
4.) Removed 2 bolts that hold the access cover in place for the fly wheel.
5.) Removed the oil pan.

That's for a ZJ, but it shold help out. Plan it out before removing it. It's not that hard than you think.

Unholyskorn86 05-13-2010 08:56 AM

Re: Oil Pan Replace
OK, now i'm lost... first you said simply unbolt it and replace. Now twist it and oil pickup? What is that? Long bolt that holds the oil pump? I have to take that off too?

Chaoul1 05-13-2010 09:15 AM

Re: Oil Pan Replace
Just go with the first one I put up. I got that from another site. Just make sure you have some jackstands so you have enough room. Drain the Oil first and then unbolt. You can look at some work on JU or JF.

scjeep4.7HO 05-13-2010 10:23 AM

Re: Oil Pan Replace
It may be hard to pull the pan off with suspension bolted up. I can't pull the pan off of my 4.7 that way. Once the pan is removed which is really not hard, you may have to clean the old gasket material off first to make sure you have a completely clean mating surface.

Buy a good rubber one piece gasket if you can. It will be reusable and you wont have to clean up anything if you ever have to drop the pan again. You have to torque youe pan bolts when you reinstall and in the correct bolt tightening sequence or you will warp the pan and have leaks all over again.

bmflyfish 05-13-2010 10:44 AM

Re: Oil Pan Replace
I just climbed under my WJ with the 4.0 and by a quick glance it looks like it just unbolts. It appears that there is a bracket for some trans cooler lines that bolts to the pan, the starter and the exhaust pipe overlaps the lip on the oil pan, but they should be able to be worked around. But I would have a rubber mallet, a deep and shallow rachet sockets, and some well rested arms. There is a alot of nuts and bolts!

Good Luck!


PS: Do not forget the thread lock when reinstalling.

bmflyfish 05-13-2010 11:09 AM

Re: Oil Pan Replace
I do not know how many miles is own your jeep, but you should consider replacing the rear main seal while you have your oil pan removed.

scjeep4.7HO 05-13-2010 01:48 PM

Re: Oil Pan Replace
My problem was getting the pan all the way out with the front axle in place. It just would not happen, but like I said that is on my 4.7. The 4L may be a piece of cake.

you will have to unhook your oil pickup tube. you'll see it once you drain and take all the bolts out and start dropping the pan. Reach in and unbolt it and drop it into the pan then pull the whole thing out at one time if you can.

Unholyskorn86 05-13-2010 07:38 PM

Re: Oil Pan Replace
Anyone got pictures/guides for dropping the pan and replacing the rear main seals?

scjeep4.7HO 05-14-2010 05:51 AM

Re: Oil Pan Replace
You have to drop the tranny to get to the rear main seal.

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