Rear Main Oil Seal
03-13-2007, 12:41 PM
#11
Guest
Posts: n/a
Re: Rear Main Oil Seal
I have done several without removing the crank. It is a 2 piece seal
that slips into place easily if you follow the lube directions on the
package.
My current engine had the rear main done in 2000 by me and is still leak
free. Now I did have the engine on the ground for this one, but only
removed the oil pan and back journal.
My valve cover however has started to seep again.... It is only held by
2 center nuts up top, no perimeter bolts on this old one.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RoyJ wrote:
> Jeep 6 cyl engines are nortorious for leaking out the rear of the valve
> cover, mimics a rear main seal leak very nicely. Take it to the self
> service car wash, wash off the back of the engine, the firewall, and as
> far down onto the bell housing as you can. Wipe it dry, look for any
> signs of fresh oil. Stick a paper towel between the firewall and engine,
> below the level of the valve cover and drive it home. If the valve cover
> is leaking, it will show up within 5 or 10 miles.
>
> Changing the rear seal and getting it to stop leaking is a major PITA.
> To do it right requires pulling the engine and the crankshaft. There are
> some tricks to doing it in the vehicle, none of those are sure fixes.
> With 170k on the engine, I'd suggest just living with the leak until it
> gets past your pain threshold. Anything over 500 miles on a quart seems
> like a reasonable point to just ignore it. This is not a catastrphic
> failure, it just gets worse with more miles.
>
> Edward R. Wojciechowski JR wrote:
>> I have a ’96 GC 4.0 with 170k and it looks like the seal is starting
>> to leak. I was wondering if there was a good web site to go to for
>> instructions on replacing this before it’s to late. Thanks in advance……
>>
that slips into place easily if you follow the lube directions on the
package.
My current engine had the rear main done in 2000 by me and is still leak
free. Now I did have the engine on the ground for this one, but only
removed the oil pan and back journal.
My valve cover however has started to seep again.... It is only held by
2 center nuts up top, no perimeter bolts on this old one.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RoyJ wrote:
> Jeep 6 cyl engines are nortorious for leaking out the rear of the valve
> cover, mimics a rear main seal leak very nicely. Take it to the self
> service car wash, wash off the back of the engine, the firewall, and as
> far down onto the bell housing as you can. Wipe it dry, look for any
> signs of fresh oil. Stick a paper towel between the firewall and engine,
> below the level of the valve cover and drive it home. If the valve cover
> is leaking, it will show up within 5 or 10 miles.
>
> Changing the rear seal and getting it to stop leaking is a major PITA.
> To do it right requires pulling the engine and the crankshaft. There are
> some tricks to doing it in the vehicle, none of those are sure fixes.
> With 170k on the engine, I'd suggest just living with the leak until it
> gets past your pain threshold. Anything over 500 miles on a quart seems
> like a reasonable point to just ignore it. This is not a catastrphic
> failure, it just gets worse with more miles.
>
> Edward R. Wojciechowski JR wrote:
>> I have a ’96 GC 4.0 with 170k and it looks like the seal is starting
>> to leak. I was wondering if there was a good web site to go to for
>> instructions on replacing this before it’s to late. Thanks in advance……
>>
03-13-2007, 12:41 PM
#12
Guest
Posts: n/a
Re: Rear Main Oil Seal
I have done several without removing the crank. It is a 2 piece seal
that slips into place easily if you follow the lube directions on the
package.
My current engine had the rear main done in 2000 by me and is still leak
free. Now I did have the engine on the ground for this one, but only
removed the oil pan and back journal.
My valve cover however has started to seep again.... It is only held by
2 center nuts up top, no perimeter bolts on this old one.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RoyJ wrote:
> Jeep 6 cyl engines are nortorious for leaking out the rear of the valve
> cover, mimics a rear main seal leak very nicely. Take it to the self
> service car wash, wash off the back of the engine, the firewall, and as
> far down onto the bell housing as you can. Wipe it dry, look for any
> signs of fresh oil. Stick a paper towel between the firewall and engine,
> below the level of the valve cover and drive it home. If the valve cover
> is leaking, it will show up within 5 or 10 miles.
>
> Changing the rear seal and getting it to stop leaking is a major PITA.
> To do it right requires pulling the engine and the crankshaft. There are
> some tricks to doing it in the vehicle, none of those are sure fixes.
> With 170k on the engine, I'd suggest just living with the leak until it
> gets past your pain threshold. Anything over 500 miles on a quart seems
> like a reasonable point to just ignore it. This is not a catastrphic
> failure, it just gets worse with more miles.
>
> Edward R. Wojciechowski JR wrote:
>> I have a ’96 GC 4.0 with 170k and it looks like the seal is starting
>> to leak. I was wondering if there was a good web site to go to for
>> instructions on replacing this before it’s to late. Thanks in advance……
>>
that slips into place easily if you follow the lube directions on the
package.
My current engine had the rear main done in 2000 by me and is still leak
free. Now I did have the engine on the ground for this one, but only
removed the oil pan and back journal.
My valve cover however has started to seep again.... It is only held by
2 center nuts up top, no perimeter bolts on this old one.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RoyJ wrote:
> Jeep 6 cyl engines are nortorious for leaking out the rear of the valve
> cover, mimics a rear main seal leak very nicely. Take it to the self
> service car wash, wash off the back of the engine, the firewall, and as
> far down onto the bell housing as you can. Wipe it dry, look for any
> signs of fresh oil. Stick a paper towel between the firewall and engine,
> below the level of the valve cover and drive it home. If the valve cover
> is leaking, it will show up within 5 or 10 miles.
>
> Changing the rear seal and getting it to stop leaking is a major PITA.
> To do it right requires pulling the engine and the crankshaft. There are
> some tricks to doing it in the vehicle, none of those are sure fixes.
> With 170k on the engine, I'd suggest just living with the leak until it
> gets past your pain threshold. Anything over 500 miles on a quart seems
> like a reasonable point to just ignore it. This is not a catastrphic
> failure, it just gets worse with more miles.
>
> Edward R. Wojciechowski JR wrote:
>> I have a ’96 GC 4.0 with 170k and it looks like the seal is starting
>> to leak. I was wondering if there was a good web site to go to for
>> instructions on replacing this before it’s to late. Thanks in advance……
>>
03-13-2007, 12:41 PM
#13
Guest
Posts: n/a
Re: Rear Main Oil Seal
I have done several without removing the crank. It is a 2 piece seal
that slips into place easily if you follow the lube directions on the
package.
My current engine had the rear main done in 2000 by me and is still leak
free. Now I did have the engine on the ground for this one, but only
removed the oil pan and back journal.
My valve cover however has started to seep again.... It is only held by
2 center nuts up top, no perimeter bolts on this old one.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RoyJ wrote:
> Jeep 6 cyl engines are nortorious for leaking out the rear of the valve
> cover, mimics a rear main seal leak very nicely. Take it to the self
> service car wash, wash off the back of the engine, the firewall, and as
> far down onto the bell housing as you can. Wipe it dry, look for any
> signs of fresh oil. Stick a paper towel between the firewall and engine,
> below the level of the valve cover and drive it home. If the valve cover
> is leaking, it will show up within 5 or 10 miles.
>
> Changing the rear seal and getting it to stop leaking is a major PITA.
> To do it right requires pulling the engine and the crankshaft. There are
> some tricks to doing it in the vehicle, none of those are sure fixes.
> With 170k on the engine, I'd suggest just living with the leak until it
> gets past your pain threshold. Anything over 500 miles on a quart seems
> like a reasonable point to just ignore it. This is not a catastrphic
> failure, it just gets worse with more miles.
>
> Edward R. Wojciechowski JR wrote:
>> I have a ’96 GC 4.0 with 170k and it looks like the seal is starting
>> to leak. I was wondering if there was a good web site to go to for
>> instructions on replacing this before it’s to late. Thanks in advance……
>>
that slips into place easily if you follow the lube directions on the
package.
My current engine had the rear main done in 2000 by me and is still leak
free. Now I did have the engine on the ground for this one, but only
removed the oil pan and back journal.
My valve cover however has started to seep again.... It is only held by
2 center nuts up top, no perimeter bolts on this old one.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)
RoyJ wrote:
> Jeep 6 cyl engines are nortorious for leaking out the rear of the valve
> cover, mimics a rear main seal leak very nicely. Take it to the self
> service car wash, wash off the back of the engine, the firewall, and as
> far down onto the bell housing as you can. Wipe it dry, look for any
> signs of fresh oil. Stick a paper towel between the firewall and engine,
> below the level of the valve cover and drive it home. If the valve cover
> is leaking, it will show up within 5 or 10 miles.
>
> Changing the rear seal and getting it to stop leaking is a major PITA.
> To do it right requires pulling the engine and the crankshaft. There are
> some tricks to doing it in the vehicle, none of those are sure fixes.
> With 170k on the engine, I'd suggest just living with the leak until it
> gets past your pain threshold. Anything over 500 miles on a quart seems
> like a reasonable point to just ignore it. This is not a catastrphic
> failure, it just gets worse with more miles.
>
> Edward R. Wojciechowski JR wrote:
>> I have a ’96 GC 4.0 with 170k and it looks like the seal is starting
>> to leak. I was wondering if there was a good web site to go to for
>> instructions on replacing this before it’s to late. Thanks in advance……
>>
03-13-2007, 07:50 PM
#14
Guest
Posts: n/a
Re: Rear Main Oil Seal
It was just marking it's territory, like your cat or dog.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
"FrankW" <fworm@norpak.ca> wrote in message
news:4sCdnVf7Za3ZVGvYnZ2dnUVZ_tCtnZ2d@magma.ca...
> I traded mine in for a new one
> after my friends wouldn't let me park
> in their driveway anymore. :-)
>
>
> RoyJ wrote:
>
> > gets past your pain threshold. Anything over 500 miles on a quart seems
> > like a reasonable point to just ignore it. This is not a catastrphic
> > failure, it just gets worse with more miles.
> >
>
--
Posted via a free Usenet account from http://www.teranews.com
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
"FrankW" <fworm@norpak.ca> wrote in message
news:4sCdnVf7Za3ZVGvYnZ2dnUVZ_tCtnZ2d@magma.ca...
> I traded mine in for a new one
> after my friends wouldn't let me park
> in their driveway anymore. :-)
>
>
> RoyJ wrote:
>
> > gets past your pain threshold. Anything over 500 miles on a quart seems
> > like a reasonable point to just ignore it. This is not a catastrphic
> > failure, it just gets worse with more miles.
> >
>
--
Posted via a free Usenet account from http://www.teranews.com
03-13-2007, 07:50 PM
#15
Guest
Posts: n/a
Re: Rear Main Oil Seal
It was just marking it's territory, like your cat or dog.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
"FrankW" <fworm@norpak.ca> wrote in message
news:4sCdnVf7Za3ZVGvYnZ2dnUVZ_tCtnZ2d@magma.ca...
> I traded mine in for a new one
> after my friends wouldn't let me park
> in their driveway anymore. :-)
>
>
> RoyJ wrote:
>
> > gets past your pain threshold. Anything over 500 miles on a quart seems
> > like a reasonable point to just ignore it. This is not a catastrphic
> > failure, it just gets worse with more miles.
> >
>
--
Posted via a free Usenet account from http://www.teranews.com
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
"FrankW" <fworm@norpak.ca> wrote in message
news:4sCdnVf7Za3ZVGvYnZ2dnUVZ_tCtnZ2d@magma.ca...
> I traded mine in for a new one
> after my friends wouldn't let me park
> in their driveway anymore. :-)
>
>
> RoyJ wrote:
>
> > gets past your pain threshold. Anything over 500 miles on a quart seems
> > like a reasonable point to just ignore it. This is not a catastrphic
> > failure, it just gets worse with more miles.
> >
>
--
Posted via a free Usenet account from http://www.teranews.com
03-13-2007, 07:50 PM
#16
Guest
Posts: n/a
Re: Rear Main Oil Seal
It was just marking it's territory, like your cat or dog.
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
"FrankW" <fworm@norpak.ca> wrote in message
news:4sCdnVf7Za3ZVGvYnZ2dnUVZ_tCtnZ2d@magma.ca...
> I traded mine in for a new one
> after my friends wouldn't let me park
> in their driveway anymore. :-)
>
>
> RoyJ wrote:
>
> > gets past your pain threshold. Anything over 500 miles on a quart seems
> > like a reasonable point to just ignore it. This is not a catastrphic
> > failure, it just gets worse with more miles.
> >
>
--
Posted via a free Usenet account from http://www.teranews.com
God Bless America, Bill 0|||||||0
mailto:-------------------- http://www.----------.com/
"FrankW" <fworm@norpak.ca> wrote in message
news:4sCdnVf7Za3ZVGvYnZ2dnUVZ_tCtnZ2d@magma.ca...
> I traded mine in for a new one
> after my friends wouldn't let me park
> in their driveway anymore. :-)
>
>
> RoyJ wrote:
>
> > gets past your pain threshold. Anything over 500 miles on a quart seems
> > like a reasonable point to just ignore it. This is not a catastrphic
> > failure, it just gets worse with more miles.
> >
>
--
Posted via a free Usenet account from http://www.teranews.com
03-13-2007, 09:39 PM
#17
Guest
Posts: n/a
Re: Rear Main Oil Seal
The rear main is probably okay. The actual problem is usually the valve
cover gasket.
I replaced my rear main twice before I found this out. And, I was able to
physically watch the oil flow out the back of the valve cover, near the
firewall.
"Edward R. Wojciechowski JR" <wojo@andrew.cmu.edu> wrote in message
news:007601c7657a$72f283a0$64380280@andrew.ad.cmu. edu...
>I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> leak. I was wondering if there was a good web site to go to for
> instructions
> on replacing this before it's to late. Thanks in advance..
>
>
cover gasket.
I replaced my rear main twice before I found this out. And, I was able to
physically watch the oil flow out the back of the valve cover, near the
firewall.
"Edward R. Wojciechowski JR" <wojo@andrew.cmu.edu> wrote in message
news:007601c7657a$72f283a0$64380280@andrew.ad.cmu. edu...
>I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> leak. I was wondering if there was a good web site to go to for
> instructions
> on replacing this before it's to late. Thanks in advance..
>
>
03-13-2007, 09:39 PM
#18
Guest
Posts: n/a
Re: Rear Main Oil Seal
The rear main is probably okay. The actual problem is usually the valve
cover gasket.
I replaced my rear main twice before I found this out. And, I was able to
physically watch the oil flow out the back of the valve cover, near the
firewall.
"Edward R. Wojciechowski JR" <wojo@andrew.cmu.edu> wrote in message
news:007601c7657a$72f283a0$64380280@andrew.ad.cmu. edu...
>I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> leak. I was wondering if there was a good web site to go to for
> instructions
> on replacing this before it's to late. Thanks in advance..
>
>
cover gasket.
I replaced my rear main twice before I found this out. And, I was able to
physically watch the oil flow out the back of the valve cover, near the
firewall.
"Edward R. Wojciechowski JR" <wojo@andrew.cmu.edu> wrote in message
news:007601c7657a$72f283a0$64380280@andrew.ad.cmu. edu...
>I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> leak. I was wondering if there was a good web site to go to for
> instructions
> on replacing this before it's to late. Thanks in advance..
>
>
03-13-2007, 09:39 PM
#19
Guest
Posts: n/a
Re: Rear Main Oil Seal
The rear main is probably okay. The actual problem is usually the valve
cover gasket.
I replaced my rear main twice before I found this out. And, I was able to
physically watch the oil flow out the back of the valve cover, near the
firewall.
"Edward R. Wojciechowski JR" <wojo@andrew.cmu.edu> wrote in message
news:007601c7657a$72f283a0$64380280@andrew.ad.cmu. edu...
>I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> leak. I was wondering if there was a good web site to go to for
> instructions
> on replacing this before it's to late. Thanks in advance..
>
>
cover gasket.
I replaced my rear main twice before I found this out. And, I was able to
physically watch the oil flow out the back of the valve cover, near the
firewall.
"Edward R. Wojciechowski JR" <wojo@andrew.cmu.edu> wrote in message
news:007601c7657a$72f283a0$64380280@andrew.ad.cmu. edu...
>I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> leak. I was wondering if there was a good web site to go to for
> instructions
> on replacing this before it's to late. Thanks in advance..
>
>
03-14-2007, 08:45 AM
#20
Guest
Posts: n/a
Re: Rear Main Oil Seal
On Mar 13, 8:39 pm, "Jeff Strickland" <c...@verizon.net> wrote:
> The rear main is probably okay. The actual problem is usually the valve
> cover gasket.
>
> I replaced my rear main twice before I found this out. And, I was able to
> physically watch the oil flow out the back of the valve cover, near the
> firewall.
>
> "Edward R. Wojciechowski JR" <w...@andrew.cmu.edu> wrote in messagenews:007601c7657a$72f283a0$64380280@andrew. ad.cmu.edu...
>
> >I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> > leak. I was wondering if there was a good web site to go to for
> > instructions
> > on replacing this before it's to late. Thanks in advance..
I just replaced my rear main seal, and it was actually the rear main
seal as I had already replaced the valve cover gasket. However the
valve cover job was much easier to accomplish. I don't want to do the
seal job again for a very long time. The top seal was easier to get
out once I found that if you push up with a punch on the right hand
side (passenger) of the upper seal while someone else turns the
crankshaft it will rotate right out.
> The rear main is probably okay. The actual problem is usually the valve
> cover gasket.
>
> I replaced my rear main twice before I found this out. And, I was able to
> physically watch the oil flow out the back of the valve cover, near the
> firewall.
>
> "Edward R. Wojciechowski JR" <w...@andrew.cmu.edu> wrote in messagenews:007601c7657a$72f283a0$64380280@andrew. ad.cmu.edu...
>
> >I have a '96 GC 4.0 with 170k and it looks like the seal is starting to
> > leak. I was wondering if there was a good web site to go to for
> > instructions
> > on replacing this before it's to late. Thanks in advance..
I just replaced my rear main seal, and it was actually the rear main
seal as I had already replaced the valve cover gasket. However the
valve cover job was much easier to accomplish. I don't want to do the
seal job again for a very long time. The top seal was easier to get
out once I found that if you push up with a punch on the right hand
side (passenger) of the upper seal while someone else turns the
crankshaft it will rotate right out.