Rear Main Seal - Pirate4x4.Com : 4x4 and Off-Road Forum

Keith Strong · 10-27-2003, 12:31 PM

I have never done one with the motor in the vehicle

Can I change a YJ 6 cyl rear main without pulling the case and tranny?

Leroux · 10-27-2003, 01:00 PM

http://www.jeepin.com/features/rearmain/index.asp

biggin · 10-27-2003, 01:18 PM

Its no problem with all of it still in Just remove the rear main bearing cap and take a small punch and tap it aroud the crank till you can get a hold of it on the other side and pull it out. Thread the new one in the same way and replace cap to propper specs.

Pavemen · 10-27-2003, 02:15 PM

Quote:

Originally posted by jeep2.5
Its no problem with all of it still in Just remove the rear main bearing cap and take a small punch and tap it aroud the crank till you can get a hold of it on the other side and pull it out. Thread the new one in the same way and replace cap to propper specs.

not exactly your rig, but i was able to do it in my 97 Ram with v8/auto

http://www.pavementsucks.com/tech/rearmain.php

ChiXJeff · 10-27-2003, 02:24 PM

Quote:

Originally posted by jeep2.5
Its no problem with all of it still in Just remove the rear main bearing cap and take a small punch and tap it aroud the crank till you can get a hold of it on the other side and pull it out. Thread the new one in the same way and replace cap to propper specs.

Don't use a STEEL punch! Get a brass drift for this so you don't scar any of the sealing surfaces. And be careful of Sneaky Pete tools, the braided steel can still do some damage.

Another tip I've heard is to put a breaker bar on the harmonic balancer nut and gently turn the engine over to spen the seal out. Note that I have not personally tried this......

2 XJs had their rear mains changed in the Slickrock campground in Moab a couple of weeks back. A 4-6 hour job.

ChiXJeff

Jason R · 10-27-2003, 02:45 PM

I know with the 4.0s you can so I imagine the 4banger would be the same.

EDIT: I thought you were talking about your jeep. Yes you can do it w/o pulling everything back.

Weasel · 10-27-2003, 03:18 PM

best write up I have found one the web:

http://www.darksiderz.co.uk/technica...main/index.htm

might have to register but it's a good site anyways.

geberhard · 10-27-2003, 04:27 PM

Hi Keith!

How are ya mon? Hey, there are a bunch of write ups out there, so I suggest read them, since tehre are a bunch of tips on the repalcement of teh main seal.

The one I liek the most is teh one Larousx posted before on:

http://jeepin.com/features/rearmain/index.asp

I recomemnd getting two sets, since those things can fall apart (mine had a hairline crack on teh rubber, so I got another one). Use soap water to isntall them, it makes teh job easier, at least it did for me).

ANother good write ups here:

http://www.bc4x4.com/faqs/yj.cfm?cat=5&faqid=40

http://www.ifsja.org/tech/motors/rearmainseal.shtml

Make sure taht the seal lips face the engine!

Good luck!

Gui

MC · 10-27-2003, 04:53 PM

two piece main easy to replace, turning the motor over will NOT take the upper half of the seal out, dont put the seal in backwards (easy to do)

mikeswrangler · 10-27-2003, 06:21 PM

hey keith.. so your a noob again..
man thought you knew it all..
lol

hey what do you tell everyone ..

USE THE SEARCH BUTTONUSE THE SEARCH BUTTON

so there.. go find it..
laters..
yea you can do it.. its e-z..
just use a brass punch tho
and I have tried to use the installer wire.. forget it..
just push it in till it gets tight.. turn the shaft to finish it..
make sure its in all the way tho..
use some assy lube for the seal.. when you install it..
if you cant get it.. lol
use a bigger hammer.. on it
later ..
mike

Keith Strong · 10-28-2003, 10:50 AM

Quote:

Originally posted by mikeswrangler

man thought you knew it all..

Suck me

Thanks for the links guys

JeepinDoug · 10-28-2003, 05:51 PM

Keith, You'll need to drop the passeger side motor mount out of the way to drop the pan.
Push one side of the seal and then grab the other and rotate it out.
The trick is installing the new one.
***DO NOT OIL IT***
You could actually put a slight coat of vaseline or assm lube on the seal side only. On the block side of the seal use liquid dish soap to make it slippery.
Oil will swell the rubber making everything tight as h3ll. It's already gonna be tight pushing back around, tight enough to shear rubber off the block side of the seal.
On the cap seal use oil if you want, it doesn't matter.

Keith Strong · 10-30-2003, 07:51 AM

Quote:

Originally posted by JeepinDoug
Keith, You'll need to drop the passeger side motor mount out of the way to drop the pan.

NOOOOOOOOOOOOOOOOOOOOOOOOOOOO

Are you sure?

geberhard · 10-30-2003, 08:50 AM

Hmmm, I did not have to drop the motor mount on mine, and the pan came out fine. Doug, do you have a body lift kit or something that moved your engine up? ine was ok, and I had no problems removing the pan. Again, that was on a YJ.

Gui

biggin · 10-30-2003, 12:43 PM

Quote:

Originally posted by JeepinDoug
Keith, You'll need to drop the passeger side motor mount out of the way to drop the pan.
Push one side of the seal and then grab the other and rotate it out.
The trick is installing the new one.
***DO NOT OIL IT***
You could actually put a slight coat of vaseline or assm lube on the seal side only. On the block side of the seal use liquid dish soap to make it slippery.
Oil will swell the rubber making everything tight as h3ll. It's already gonna be tight pushing back around, tight enough to shear rubber off the block side of the seal.
On the cap seal use oil if you want, it doesn't matter.

I never removed the motor mount. Hmmm. Are you talking about a 2.5 maybe

mikeswrangler · 10-30-2003, 12:50 PM

hey kieth..
ok.. heres how to do it..

remove all mounts
remove all fuel lines and other stuff connected to the engine.. including the transmission..
pull out the engine.. replace engine with a 350 chev..
and get adapter for trans.. put it together and there you go.. good as new..

hey

good luck..

its e-z to do realy..
just take your time doing it..
dont let it get you mad..

later

mike

JeepinDoug · 10-30-2003, 05:21 PM

Mine's a CJ5 with a 4.2, same configuration. I use a MORE bomb proof mount and had to disconnect the bushing section just enough to let it drop out the way. Remember the pass side has the bulge for the dist and dip stick, it's hard to get the pan past the mount b/c of the ear in the pan.
It's not a big deal to do, just stuff a 2x4 between the alt mount and frame rail.
If you have stock mounts than maybe it's easier to get the pan out, I can't remember, it's been years since I had to fix a stock mount.

Keith Strong · 10-31-2003, 11:58 AM

Quote:

Originally posted by mikeswrangler
hey kieth..
ok.. heres how to do it..

remove all mounts
remove all fuel lines and other stuff connected to the engine.. including the transmission..
pull out the engine.. replace engine with a 350 chev..
and get adapter for trans.. put it together and there you go.. good as new..

hey

good luck..

its e-z to do realy..
just take your time doing it..
dont let it get you mad..

later

mike

Its my brothers mall crawler and its going up for sale

10-27-2003, 12:31 PM	#1 (permalink)
Keith Strong Registered User Join Date: Mar 2000 Member # 477 Location: The Peeplz Republik Posts: 12,257	Rear Main Seal I have never done one with the motor in the vehicle Can I change a YJ 6 cyl rear main without pulling the case and tranny? __________________ [CENTER][SIZE="5"][URL="http://www.strong-arms.com"]Strong Arms "Survival Slings" For Sale PM me for a PBB only price[/URL] [/SIZE][/CENTER]

10-27-2003, 01:00 PM	#2 (permalink)
Leroux Registered User Join Date: Oct 2003 Member # 23898 Location: Roseburg, OR Posts: 3	http://www.jeepin.com/features/rearmain/index.asp __________________ 93 Wrangler 4.0

10-27-2003, 02:45 PM	#6 (permalink)
Jason R Registered User Join Date: May 2002 Member # 11598 Location: USA Posts: 6,063	I know with the 4.0s you can so I imagine the 4banger would be the same. EDIT: I thought you were talking about your jeep. Yes you can do it w/o pulling everything back. __________________ This space for rent.

10-27-2003, 04:27 PM	#8 (permalink)
geberhard Moderator Join Date: Jul 2001 Member # 5861 Location: California Posts: 8,491	Hi Keith! How are ya mon? Hey, there are a bunch of write ups out there, so I suggest read them, since tehre are a bunch of tips on the repalcement of teh main seal. The one I liek the most is teh one Larousx posted before on: http://jeepin.com/features/rearmain/index.asp I recomemnd getting two sets, since those things can fall apart (mine had a hairline crack on teh rubber, so I got another one). Use soap water to isntall them, it makes teh job easier, at least it did for me). ANother good write ups here: http://www.bc4x4.com/faqs/yj.cfm?cat=5&faqid=40 http://www.ifsja.org/tech/motors/rearmainseal.shtml Make sure taht the seal lips face the engine! Good luck! Gui __________________ Help us cure kids cancer! Shave for the cause :) Tips on how to build your Jeep bigger! New build, daily driver TJ on 44" rubbers Project hot 40 year old

10-27-2003, 04:53 PM	#9 (permalink)
MC Pirate4x4 Addict! Join Date: Aug 2003 Member # 21997 Location: Insane CNC machine mfg Posts: 5,274	two piece main easy to replace, turning the motor over will NOT take the upper half of the seal out, dont put the seal in backwards (easy to do) __________________ Industrial Quality CNC machines at a Hobby Price! USA Quality is job #1 We build CNC plasma tables, click me .................................................. ......... American Motors Engine HERE!! 1-651-257-7917

10-27-2003, 01:18 PM	#3 (permalink)
biggin Registered User Join Date: Aug 2003 Member # 22183 Location: e.tn Posts: 1,231	Its no problem with all of it still in Just remove the rear main bearing cap and take a small punch and tap it aroud the crank till you can get a hold of it on the other side and pull it out. Thread the new one in the same way and replace cap to propper specs.

10-27-2003, 03:18 PM	#7 (permalink)
Weasel Pirate4x4 Addict! Join Date: Jul 2001 Member # 5639 Location: Rapid City, SD Posts: 5,945	best write up I have found one the web: http://www.darksiderz.co.uk/technica...main/index.htm might have to register but it's a good site anyways.

10-27-2003, 06:21 PM	#10 (permalink)
mikeswrangler Registered User Join Date: Apr 2003 Member # 19089 Location: venus ,texas Posts: 762	hey keith.. so your a noob again.. man thought you knew it all.. lol hey what do you tell everyone .. USE THE SEARCH BUTTONUSE THE SEARCH BUTTON so there.. go find it.. laters.. yea you can do it.. its e-z.. just use a brass punch tho and I have tried to use the installer wire.. forget it.. just push it in till it gets tight.. turn the shaft to finish it.. make sure its in all the way tho.. use some assy lube for the seal.. when you install it.. if you cant get it.. lol use a bigger hammer.. on it later .. mike __________________ 93 wrangler,456 gears,33x12.5 tires,on board air,3" bodylift,4" shackels, front axel open, rear track lock , daily driver, spring over ... passenger side step ..for wife to get in.. 91 4runner stock for now with 32's

10-28-2003, 05:51 PM	#12 (permalink)
JeepinDoug Registered User Join Date: Jul 2002 Member # 13028 Location: So.S.F., CA Posts: 3,124	Keith, You'll need to drop the passeger side motor mount out of the way to drop the pan. Push one side of the seal and then grab the other and rotate it out. The trick is installing the new one. *DO NOT OIL IT* You could actually put a slight coat of vaseline or assm lube on the seal side only. On the block side of the seal use liquid dish soap to make it slippery. Oil will swell the rubber making everything tight as h3ll. It's already gonna be tight pushing back around, tight enough to shear rubber off the block side of the seal. On the cap seal use oil if you want, it doesn't matter. __________________ I may lack much in way of integrety but I make up for it with pure denial. [URL=http://www.pirate4x4.com/forum/showthread.php?t=377480][B][COLOR="Red"]Malvado Grande #1[/COLOR][/B][/URL]

10-30-2003, 08:50 AM	#14 (permalink)
geberhard Moderator Join Date: Jul 2001 Member # 5861 Location: California Posts: 8,491	Hmmm, I did not have to drop the motor mount on mine, and the pan came out fine. Doug, do you have a body lift kit or something that moved your engine up? ine was ok, and I had no problems removing the pan. Again, that was on a YJ. Gui __________________ Help us cure kids cancer! Shave for the cause :) Tips on how to build your Jeep bigger! New build, daily driver TJ on 44" rubbers Project hot 40 year old

10-30-2003, 12:50 PM	#16 (permalink)
mikeswrangler Registered User Join Date: Apr 2003 Member # 19089 Location: venus ,texas Posts: 762	hey kieth.. ok.. heres how to do it.. remove all mounts remove all fuel lines and other stuff connected to the engine.. including the transmission.. pull out the engine.. replace engine with a 350 chev.. and get adapter for trans.. put it together and there you go.. good as new.. hey good luck.. its e-z to do realy.. just take your time doing it.. dont let it get you mad.. later mike __________________ 93 wrangler,456 gears,33x12.5 tires,on board air,3" bodylift,4" shackels, front axel open, rear track lock , daily driver, spring over ... passenger side step ..for wife to get in.. 91 4runner stock for now with 32's

10-30-2003, 05:21 PM	#17 (permalink)
JeepinDoug Registered User Join Date: Jul 2002 Member # 13028 Location: So.S.F., CA Posts: 3,124	Mine's a CJ5 with a 4.2, same configuration. I use a MORE bomb proof mount and had to disconnect the bushing section just enough to let it drop out the way. Remember the pass side has the bulge for the dist and dip stick, it's hard to get the pan past the mount b/c of the ear in the pan. It's not a big deal to do, just stuff a 2x4 between the alt mount and frame rail. If you have stock mounts than maybe it's easier to get the pan out, I can't remember, it's been years since I had to fix a stock mount. __________________ I may lack much in way of integrety but I make up for it with pure denial. [URL=http://www.pirate4x4.com/forum/showthread.php?t=377480][B][COLOR="Red"]Malvado Grande #1[/COLOR][/B][/URL] Last edited by JeepinDoug; 10-30-2003 at 05:23 PM.

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