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Old 11-15-2015, 01:21 PM
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Jeep oil pan replacement

hi guys

so i have a rear main leak pretty obv (see pics below) but i was wondering...should i get a new oil pan? mine is kinda ok but wanted a true gurus opinion. and is their anything else that i should be thinking of replacing when i send my 04 tj to the shop? like maybe changing my pipes or something.

appreciate the help.

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Old 11-15-2015, 06:43 PM
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bumpzilla

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Old 11-15-2015, 07:25 PM   #3
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bumpzilla
keep the oil pan as long as it seals up just fine.

Honestly, if you're not losing a lot of oil, that job isn't worth it. You've got to drop the exhaust then drop the oil pan, engine brace and main bearing cap. Then hammer the old seal out with a brass punch. It's a very tedious and messy job. If you're down for all of that, go for it. But if there's any doubt, bring it to a shop.
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Old 11-16-2015, 10:21 PM
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thanks jherr i was thinking the same.

that would mean probably getting a new gasket then im assuming. any places to look for an oem gasket?
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Old 11-16-2015, 10:28 PM   #5
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thanks jherr i was thinking the same. that would mean probably getting a new gasket then im assuming. any places to look for an oem gasket?
Oil pan or rear main? Get the rear main from mopar.

Oil pan, autozone will do.
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Old 11-16-2015, 10:29 PM   #6
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If your going to have the pan taken off, why not spend the extra $80 dollars or so to have a new pan put on. Yours seems pretty rusted so it can hurt. In order to replace the main seal, you gotta remove the pan. Its not the easiest thing to do because the location of the exhaust.
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Old 11-17-2015, 12:10 AM   #7
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X2 on the replacing the oil pan. It's got lots of rust. Time to change it. It's only going to cost you for parts so do it.
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Old 11-17-2015, 12:48 AM   #8
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Nothing about that oil pan that a wire brush and some Rustoleum hammered finish paint can't take care of. And maybe some red oxide primer.
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Old 11-17-2015, 09:15 AM   #9
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If the pan is coming off (which it is if your replacing the rear main) then you should replace it as a preventative measure if you can afford it. A wire brush and rustoleum is only going to do you so well. You cant add metal back after it has been rusted off. Like greencop said, the pan is off. there should be no extra labor involved. just parts.
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Old 11-17-2015, 11:11 AM   #10
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Go for a Felpro oil pan gasket kit which includes plastic alignment studs to keep the gasket in place and help align the pan. The few extra bucks are well worth the cost.
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Old 11-17-2015, 08:05 PM
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thanks a lot guys! if i can get a link to the new oil pan from felpro that comes with the gasket im guessing that would be great any other things i should be be concerned about i could use a new muffler i guess and i think one of my oxygen sensors is broken and would you guys agree that this would be a good chance to maybe take of the skid plate?

appreciate the thoughts
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Old 11-17-2015, 08:33 PM   #12
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if i can get a link to the new oil pan from felpro that comes with the gasket im guessing that would be great
Felpro does not make oil pans. See rockauto.com offers several options, including OE.
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Old 11-17-2015, 09:05 PM   #13
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thanks a lot guys! if i can get a link to the new oil pan from felpro that comes with the gasket im guessing that would be great any other things i should be be concerned about i could use a new muffler i guess and i think one of my oxygen sensors is broken and would you guys agree that this would be a good chance to maybe take of the skid plate?

appreciate the thoughts
If you are going to disconnect the exhaust from the manifold down to the muffler (which I believe you do have to), It cant hurt. Your going to have to take the skid plate off anyhow to take off the muffler.

And are you or a shop doing the work. Coming from experience working at a shop, we hate when people bring in their own parts and tell you to put them on. We will do it, but we wont warranty the product you brought. If the shop buys the part and it is faulty, they should/will replace it free of labor. If you bring them something that fails and they put it on, you pay to have it replaced again. I cant see what would be too faulty with a muffler, but I have had my disagreements with oil pan gaskets, especially felpro (sizing issues).
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Old 11-17-2015, 11:54 PM   #14
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I'd suggest getting a Mopar oil pan if you replace it. I went with the dorman and regret it. It's thinner I think so I can hear more bottom end engine noise and oil draining back into it when I shut it off.
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Old 11-18-2015, 02:59 PM
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thanks guys!

i dont think you need to take the skid plate off if your trying to switch the oil pan..but maybe im wrong. i decided to just shop for a new oil pan pref mopar like mentioned and a gasket that hopefully is good enough and that can size up well with the new oil pan. any more suggestions would be helpfull. will post pics after the repair...
a new muffler and pipes would be to much for me and my wallet lol
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Old 11-18-2015, 05:04 PM   #16
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thanks guys! i dont think you need to take the skid plate off if your trying to switch the oil pan..but maybe im wrong. i decided to just shop for a new oil pan pref mopar like mentioned and a gasket that hopefully is good enough and that can size up well with the new oil pan. any more suggestions would be helpfull. will post pics after the repair... a new muffler and pipes would be to much for me and my wallet lol
You only need to take the exhaust off at the down pipe. No need to pull it all out. Or the skid plate.
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Old 11-18-2015, 05:12 PM   #17
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You only need to take the exhaust off at the down pipe.
All year models are not the same. An unmodified '04 is one piece from the manifold to muffler.

The FSM calls for removing the down pipe at the manifold and disconnecting the converter hanger.
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Old 11-19-2015, 10:49 AM   #18
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unless it is loosing enough to make a mess on your driveway, I'd leave it.

A little oil leak makes a good rust preventive.
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Old 11-20-2015, 12:03 PM
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so the market value for a mopar oil pan is ridiculous any other thoughts for a good oil pan and gasket, maybe another link as to where i can find one for a good price..no junkyards haha. and the rear main leak isnt that bad, but i drive on the highway and i know it leaks when that happens. i drive a 04 sport 6cy. any other thoughts i will post pics now that its the weekend and im not busy with work. if anything i may just get the oil change and see how bad the leak is more closely.

thoughts? and again i appreciate the help.
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Old 11-20-2015, 12:18 PM   #20
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Wire brush, flap wheel, or rotary scotch pad, then paint.

However, if I was going to replace an oil pan I'd seriously consider the TJ/LJ Moroso pan. Yes, nearly everyone would laugh and say it's a waste. I ran a custom application Moroso on my old track toy though with great success and it was built quite nice. But back to your case: clean it up and paint it unless it's pitted to pieces, which it doesn't look to be.
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Old 11-21-2015, 12:23 AM   #21
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Wermopar has a mopar oil pan for $145. But you could do the wire wheel like was suggested, clean yours up, and rattle can it. I'm telling you- don't go aftermarket.
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Old 11-21-2015, 02:01 PM   #22
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Like others have said, if you've got a grinder, go to Home Depot and get a metal stripper wire wheel. You'll have that thing looking good in no time.

If you don't have a grinder, just get one for your drill. It will just take a little longer.
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Old 11-22-2015, 12:45 PM
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i wonder if my guys at the shop can do this service for me seeing as how i work in the corporate world i have no time but thanks guy i shall ask. i was also considering giving it an oil change first for now and actually check to see if my rear seal is leaking bad or just sapping.. i know i take my jeep in the highway sometimes so i know that it prob spews out a lot of the oil..so ima make a little study of my own. what do you think giving the pics i uploaded? thanks again for the support!
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Old 11-23-2015, 03:49 AM   #24
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When I have a rear main seal leak it will sometimes go down the flywheel plate cover and sometimes go down the back of the oil pan and drip from below the drain plug. It doesn't, however, cover the bottom of the oil pan like the pics. Are the oil pan bolts tightened to spec? Do you park facing downhill or something?
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Old 11-23-2015, 02:37 PM   #25
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I would replace the pan also. its only about 100$. my 1st wrangler had a small hairline crack from rust. Check around the pan bolts im sure the area is even more rusted.
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Old 11-23-2015, 04:57 PM   #26
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I would replace the pan also. its only about 100$. my 1st wrangler had a small hairline crack from rust.
What do you suspect the oil pan MTBF to be?
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Old 11-23-2015, 07:00 PM   #27
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I would replace the pan also. its only about 100$. my 1st wrangler had a small hairline crack from rust.
What do you suspect the oil pan MTBF to be?
I mean it depends on a lot of variables. Where you live, salt on roads, how you wheel and rain. So if you keep the pan salt and dent free it should last as long as the jeep now if you por 15 it before install were talking a rust proof pan!

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