oil leak after new main rear seal - JeepForum.com

 
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post #1 of 9 Old 02-15-2015, 06:01 PM Thread Starter
daltonfarr69
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1987 YJ Wrangler 
 
Join Date: Jan 2015
Location: wauchula
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oil leak after new main rear seal

I replaced my main rear seal last week after living with a oil leak for years. Afterwards the motor developed a squeaking noise coming from the under the engine at all rpms. This squeak went away after a day of driving the jeep around. Now the jeep still leaks oil and i might even say worse than before! I followed all the directions posted from old threads here on the forum and also watched several youtube videos beforehand.

has anyone heard of the squeaking after the new rear seal?
I wonder if that was the sound of the new seal getting burned up

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post #2 of 9 Old 02-15-2015, 08:49 PM
Jeepsr4me
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sounds are very hard for us to tell ya what it was... But since its leaking again, you will need to change it again. There is a double lip seal that rides on another spot on the crank so its less likely to leak.
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post #3 of 9 Old 02-16-2015, 06:05 AM
Mike Romain
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First I would take a clean rag, run the engine for a few minutes, shut it down and wipe the rag across the rear of the head just below your valve cover. If the rag finds oil, you have found the first leak.
The leak getting worse, could be a failed rear main install. Did you have it good and clean so it would stick where you put the dabs of RTV?

Mike
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post #4 of 9 Old 02-16-2015, 03:57 PM
kahanabob
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1992 YJ Wrangler 
 
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horror story, i know because i went thru it. are you positive you installed the seal correctly? one side of it goes toward the front of the engine. it is very easy to put the the top half in backwards. also the pan gasket at the rear of the pan on the 1/2 circle (where it dips down) has to line up perfectly so it seats into the groove on the engine. took mine apart twice and stilled leaked, sold it!!
good luck..........
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post #5 of 9 Old 02-17-2015, 08:58 AM
bck4more
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Ive heard many times over of people having a rear main leak and go to replace it many of time and still leaks so what ive gathered is if its just a drop here and there id leave it imo

1987 4.2 automatic, 33" Pro Comp, 2100MC, nuttered, SOA, SYE,TW driveshaft
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post #6 of 9 Old 02-17-2015, 12:40 PM
kahanabob
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Quote:
Originally Posted by bck4more View Post
Ive heard many times over of people having a rear main leak and go to replace it many of time and still leaks so what ive gathered is if its just a drop here and there id leave it imo
Good advice!!!
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post #7 of 9 Old 02-17-2015, 04:50 PM
mickcollinsb16b
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Quote:
Originally Posted by kahanabob View Post
horror story, i know because i went thru it. are you positive you installed the seal correctly? one side of it goes toward the front of the engine. it is very easy to put the the top half in backwards. also the pan gasket at the rear of the pan on the 1/2 circle (where it dips down) has to line up perfectly so it seats into the groove on the engine. took mine apart twice and stilled leaked, sold it!!
good luck..........
very important. the seal is directional. and i dont mess with the vatozone, Napa seals. just go to the dealer for something that important. ive done 3 (2-4.0's and a 4.2) and none of them leaked. one time i bought a felpro or some other aftermarket seal cause the dealer was closed and i did not get it in successful. it kept riding more on the side of the block which is sharp and it cut it. if you pm i will give you full proof method if you want. no leaks.

RoknRoll, beer & Jeeps
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post #8 of 9 Old 02-17-2015, 09:16 PM
YJ8
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1990 YJ Wrangler 
 
Join Date: Mar 2014
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Welcome to the club

You are not alone, I had to do mine 4 times before it sealed perfectly, but this is not a sad story, it has been 14 years since, with no oil leaks . You will get there too.
As stated, the seal is directional but I found the larger problem is the 4 piece oil pan gaskets are a PITA, use ample RTV in the rear corners and cross your fingers, keep the faith, one of these times you will nail it.

Yj-8
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post #9 of 9 Old 02-18-2015, 01:26 PM
Leadmine
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Another note on the pan gasket, if you don't have one go rent/buy/borrow an inch-lb torque wrench. I did a real seal and pan gasket on the 304 in my CJ. Tightened the pan bolts with a 1/4 drive ratchet tying to be careful not to squish the gasket (I think specs call for 11 to 16 in/lbs, not much). Squished it anyway, fired the engine and it POURED. Luckily we have an old school mechanic at work that I was telling my delima to and he loaned me an inch-lb wrench. I used the wrench to factory specs and *knock on wood* my engine hasn't leaked a drop of oil in about 8 months....from the pan or rear seal anyway.

1979 CJ-5 Chevy Hugger Orange paint, 304/T-18/Dana20, 4" Procomp on 33x12.5
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