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Unread 04-11-2007, 10:09 PM   #1
wessy
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Fixing rear main seal leak?

Anyone have any advice on what parts I may need like a new gasket and ideas on how to do this? I will need it done in less than a week when I have a vehicle inspection.

Also does anyone know what box you have to remove to get rid of the "check emissions" light on the dash? This is on an 89 4.2 btw.

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Unread 04-12-2007, 12:13 AM   #2
Big-n-Broke-YJ
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drop oil pan

pull out old two piece seal

install new two piece seal

reinstall oil pan with new gasket and rtv.


if you search you should be able to find at least a few write-ups from the last 6 months or so....
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Unread 04-12-2007, 03:01 AM   #3
leftlanetruckin
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if you cant find the little silver box for the emmisions light, remove the 2 screws and take out the panel that covers the idiot lights, and remove the bulb....
rear main oil seal will be well covered in the haynes/clymer manual you (should) have already....

martin
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Unread 04-12-2007, 03:21 AM   #4
rustywrangler
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Quote:
Originally Posted by wessy
Also does anyone know what box you have to remove to get rid of the "check emissions" light on the dash? This is on an 89 4.2 btw.

Look on the fire wall under the dash. To the right of the gas pedal about halfway up. It is a little plastic/silver box with one wire coming out of it. Threw mine out a while back so no pics. Its rather obvious. Its the only box near the right of the gas pedal. You can see if from the drivers seat.
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Unread 04-12-2007, 04:14 AM   #5
Axl Jack
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rear main seal writeup:

http://jeepin.com/features/rearmain/index.asp
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Unread 04-12-2007, 06:09 AM   #6
Richmond88yj
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Before you go into this messy messy job, make sure it is the RMS that's leaking.

Many of us have fought with this only to find it was actually the valve cover gasket leaking (easy fix) and blowing back then dripping down the bellhousing making it look like RMS.
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Unread 04-12-2007, 07:32 AM   #7
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the little box for the emmissions light has a clear cover with little plastic gears in it right by the pedal as rescuer said. when u do the seal- just make sure that u get ALL of the old gasket material off. i had a problem in the back when i was putting mine back on-there was a little piece of the old gasket that i didnt see was still there. i also used a 1 piece gasket with the rtv to hold it in and seal it. good luck
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Unread 04-12-2007, 07:33 AM   #8
saharajeepman
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the little box for the emmissions light has a clear cover with little plastic gears in it right by the pedal as rescuer said. when u do the seal- just make sure that u get ALL of the old gasket material off. i had a problem in the back when i was putting mine back on-there was a little piece of the old gasket that i didnt see was still there. i also used a 1 piece gasket with the rtv to hold it in and seal it. good luck
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31x10.5 BFG All Terrain, 470 cfm Holley Off-Road Avenger, Nutter Bypass,
RE 2.5, Currie Shackles front and boomerang rear
TJ front driveshaft, SYE, Tom Woods rear driveshaft, Posi-lok, AX-15 swap.
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Unread 04-12-2007, 11:49 AM   #9
wessy
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cool thanks for all the help guys I will get that emissions box out and I have to fix the turn signal/wiper lever today. I also got a chiltons repair manual today and I will probably fix the rear main seal on monday during shop class although I may do it this weekend and then the jeep should be reaady for the insurance inspecion.
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Unread 04-12-2007, 11:58 AM   #10
mean90yj
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i just did the RMS replacement to find out that it was just the rear oil pan gasket, the part where it mounts right up to the RMS. It was torn to crap, so before you go picking away at the RMS, b/c it does not slide right out, i even tried hitting it with a punch and a hammer, didn't budge, PB plaster got it out for me. I didn't attempt the top part of the RMS, since mine is a 2 piece, it would be impossible to get out w/o removing the trans. It says you just tap it with a drift pin and it slides out the other side and you just pull it out with some needle nose pliars...yea right....also, get some wire brushes for the drill but to scrape off all of the old oil pan gasket, chances are it will be stuck on there really really good if it is the stock gasket. And then get some razor blades to scrape it off the bottom of the engine.
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