Can a rookie change the rear main oil seal? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-03-2000, 09:50 PM
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Can a rookie change the rear main oil seal?

I am wondering if I should attempt to try and change my rear main oil seal or take it to a mechanic. My 1990 YJ with 4.2L has an annoying oil drip at the rear of the motor. It seems to have gotten progressively worse over the last six months. I have limited mechanical experience (read this as I am a parts changer - not a mechanic). Because of work and school I have limited time. I might have one full day off every two weeks, so I would like to get this done in one day. Can I expect any time consuming obstacles? Is this a technical procedure? I do not like paying someone else to do work for me unless it is just beyond my ability. It is becoming harder to find someone willing to do the job right. Any suggestions of opinions?

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post #2 of (permalink) Old 09-03-2000, 10:11 PM
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Re: Can a rookie change the rear main oil seal?

From one rookie to another get the chiltons manual out it should show you step by step how to do it with out messing anything up.


post #3 of (permalink) Old 09-03-2000, 10:14 PM
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Re: Can a rookie change the rear main oil seal?

It is not beyond your ability, if you think you can do it, go for it. You may have to undo one of the motor mounts that is in the way, but there is nothing technical about it. Just make sure you get the seal in straight and don't damage it, my son did the same procedure on an old Bronco a while back nicked the edge of the seal, leaked worse than before. Not fun to have to do twice in one day!

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post #4 of (permalink) Old 09-04-2000, 05:07 PM
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Re: Can a rookie change the rear main oil seal?

Most of the oil leaks at the rear of the engine can be traced to the valve cover gasket! Make absolutly sure of the leaks source before you go down below! The valve cover gasket is alot easier and quicker to change than the rear mail seal. I would definatly suspect the valve cover as being the culprit, especially since your jeep is a 90 it probably has the plastic valve cover.

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post #5 of (permalink) Old 09-04-2000, 06:39 PM
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Re: Can a rookie change the rear main oil seal?

i agree with bob!
my 87 was leaking down near the rear main seal. i thought it was the seal. i was doing other maintenance under the hood and noticed the valve cover bolts were real loose and oil leaking around the area. i tightened the bolts and soon thereafter noticed NO LEAKS under jeep and that was in feb. no leaks since![img]/wwwthreads_images/icons/smile.gif[/img]

post #6 of (permalink) Old 09-04-2000, 07:37 PM
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Re: Can a rookie change the rear main oil seal?

I have done it myself before and I am not even close to being much of a mechanic. It was on a Subaru and I actually got the damn thing to stop leaking oil completely...

Josh Lavalleur
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post #7 of (permalink) Old 09-04-2000, 11:00 PM
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Re: Can a rookie change the rear main oil seal?

TrailJeep and I replaced the rear main on his 97 TJ in about 5 hours and we were working slow. I don't know how the exhaust is run on your YJ but you might need to disconnect it at the manifold. Get the manual, jack stands, the seal, an oil pan gasket(or RTV) and a torque wrench and have at it. Shouldn't be to hard. Have fun.

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