Crank seal replace - 90 Cherokee
02-19-2004, 02:23 PM
#11
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
"jbcrow" <jbcrow@flex.com> wrote in message
news:ebd4f35d.0402191029.7754ccb@posting.google.co m...
> jbcrow@flex.com (jbcrow) wrote in message
news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
It's at most a two banana job, opposable thumbs are not required. The only
difficulty I ran into was getting the upper seal out. Kind of baked in.
There was a steel core in the seal and I used a brass drift on that and
*carefully* tapped the seal out. While you have the pan off it's not a bad
idea to take a peek at the bearings.
Jeff '00 XJ, '91YJ
02-19-2004, 02:23 PM
#12
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
"jbcrow" <jbcrow@flex.com> wrote in message
news:ebd4f35d.0402191029.7754ccb@posting.google.co m...
> jbcrow@flex.com (jbcrow) wrote in message
news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
It's at most a two banana job, opposable thumbs are not required. The only
difficulty I ran into was getting the upper seal out. Kind of baked in.
There was a steel core in the seal and I used a brass drift on that and
*carefully* tapped the seal out. While you have the pan off it's not a bad
idea to take a peek at the bearings.
Jeff '00 XJ, '91YJ
02-19-2004, 02:23 PM
#13
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
"jbcrow" <jbcrow@flex.com> wrote in message
news:ebd4f35d.0402191029.7754ccb@posting.google.co m...
> jbcrow@flex.com (jbcrow) wrote in message
news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
It's at most a two banana job, opposable thumbs are not required. The only
difficulty I ran into was getting the upper seal out. Kind of baked in.
There was a steel core in the seal and I used a brass drift on that and
*carefully* tapped the seal out. While you have the pan off it's not a bad
idea to take a peek at the bearings.
Jeff '00 XJ, '91YJ
02-19-2004, 03:49 PM
#14
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
Biggest problems I had doing it that way were:
1. getting the pan off. The original gasket had fused into the block
and pan - almost like a weld. That lead to 2.
2. cleaning off the old gasket. Only way I can puit it was "What a
bitch"!
3. getting the top half of the seal out. Mine was grown in about like
the pan gasket. Get a length of brass rod just less than 1/4 inch
diameter to use as a driver so that you don't score the crank. I
pounded a good half inch mushroom on the end of the one I used before
that half seal finally broke loose. I had loosened all the main caps
and let the tranny droop just enough to take the pressure off but it
still took a BMFH and some serious pounding to get that thing out.
That was the worst one I ever tried to do and I've done a few. The
new one slipped in slick as snot. (Don't forget to lift the tranny
back up and re-torque the mains <g>).
Simple job, but the devil's in the details. Getting the old pan
gasket off is a royal pain but be sure it's all off and clean. I used
the 3-piece pan gasket set and that's fun to keep in place but I under
stand that there is a one piece gasket available that would simplify
things a bit.
On Thu, 19 Feb 2004 18:29:10 UTC jbcrow@flex.com (jbcrow) wrote:
> jbcrow@flex.com (jbcrow) wrote in message news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
>
> thanks again,
> JB
--
Will Honea <whonea@codenet.net>
1. getting the pan off. The original gasket had fused into the block
and pan - almost like a weld. That lead to 2.
2. cleaning off the old gasket. Only way I can puit it was "What a
bitch"!
3. getting the top half of the seal out. Mine was grown in about like
the pan gasket. Get a length of brass rod just less than 1/4 inch
diameter to use as a driver so that you don't score the crank. I
pounded a good half inch mushroom on the end of the one I used before
that half seal finally broke loose. I had loosened all the main caps
and let the tranny droop just enough to take the pressure off but it
still took a BMFH and some serious pounding to get that thing out.
That was the worst one I ever tried to do and I've done a few. The
new one slipped in slick as snot. (Don't forget to lift the tranny
back up and re-torque the mains <g>).
Simple job, but the devil's in the details. Getting the old pan
gasket off is a royal pain but be sure it's all off and clean. I used
the 3-piece pan gasket set and that's fun to keep in place but I under
stand that there is a one piece gasket available that would simplify
things a bit.
On Thu, 19 Feb 2004 18:29:10 UTC jbcrow@flex.com (jbcrow) wrote:
> jbcrow@flex.com (jbcrow) wrote in message news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
>
> thanks again,
> JB
--
Will Honea <whonea@codenet.net>
02-19-2004, 03:49 PM
#15
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
Biggest problems I had doing it that way were:
1. getting the pan off. The original gasket had fused into the block
and pan - almost like a weld. That lead to 2.
2. cleaning off the old gasket. Only way I can puit it was "What a
bitch"!
3. getting the top half of the seal out. Mine was grown in about like
the pan gasket. Get a length of brass rod just less than 1/4 inch
diameter to use as a driver so that you don't score the crank. I
pounded a good half inch mushroom on the end of the one I used before
that half seal finally broke loose. I had loosened all the main caps
and let the tranny droop just enough to take the pressure off but it
still took a BMFH and some serious pounding to get that thing out.
That was the worst one I ever tried to do and I've done a few. The
new one slipped in slick as snot. (Don't forget to lift the tranny
back up and re-torque the mains <g>).
Simple job, but the devil's in the details. Getting the old pan
gasket off is a royal pain but be sure it's all off and clean. I used
the 3-piece pan gasket set and that's fun to keep in place but I under
stand that there is a one piece gasket available that would simplify
things a bit.
On Thu, 19 Feb 2004 18:29:10 UTC jbcrow@flex.com (jbcrow) wrote:
> jbcrow@flex.com (jbcrow) wrote in message news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
>
> thanks again,
> JB
--
Will Honea <whonea@codenet.net>
1. getting the pan off. The original gasket had fused into the block
and pan - almost like a weld. That lead to 2.
2. cleaning off the old gasket. Only way I can puit it was "What a
bitch"!
3. getting the top half of the seal out. Mine was grown in about like
the pan gasket. Get a length of brass rod just less than 1/4 inch
diameter to use as a driver so that you don't score the crank. I
pounded a good half inch mushroom on the end of the one I used before
that half seal finally broke loose. I had loosened all the main caps
and let the tranny droop just enough to take the pressure off but it
still took a BMFH and some serious pounding to get that thing out.
That was the worst one I ever tried to do and I've done a few. The
new one slipped in slick as snot. (Don't forget to lift the tranny
back up and re-torque the mains <g>).
Simple job, but the devil's in the details. Getting the old pan
gasket off is a royal pain but be sure it's all off and clean. I used
the 3-piece pan gasket set and that's fun to keep in place but I under
stand that there is a one piece gasket available that would simplify
things a bit.
On Thu, 19 Feb 2004 18:29:10 UTC jbcrow@flex.com (jbcrow) wrote:
> jbcrow@flex.com (jbcrow) wrote in message news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
>
> thanks again,
> JB
--
Will Honea <whonea@codenet.net>
02-19-2004, 03:49 PM
#16
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
Biggest problems I had doing it that way were:
1. getting the pan off. The original gasket had fused into the block
and pan - almost like a weld. That lead to 2.
2. cleaning off the old gasket. Only way I can puit it was "What a
bitch"!
3. getting the top half of the seal out. Mine was grown in about like
the pan gasket. Get a length of brass rod just less than 1/4 inch
diameter to use as a driver so that you don't score the crank. I
pounded a good half inch mushroom on the end of the one I used before
that half seal finally broke loose. I had loosened all the main caps
and let the tranny droop just enough to take the pressure off but it
still took a BMFH and some serious pounding to get that thing out.
That was the worst one I ever tried to do and I've done a few. The
new one slipped in slick as snot. (Don't forget to lift the tranny
back up and re-torque the mains <g>).
Simple job, but the devil's in the details. Getting the old pan
gasket off is a royal pain but be sure it's all off and clean. I used
the 3-piece pan gasket set and that's fun to keep in place but I under
stand that there is a one piece gasket available that would simplify
things a bit.
On Thu, 19 Feb 2004 18:29:10 UTC jbcrow@flex.com (jbcrow) wrote:
> jbcrow@flex.com (jbcrow) wrote in message news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
>
> thanks again,
> JB
--
Will Honea <whonea@codenet.net>
1. getting the pan off. The original gasket had fused into the block
and pan - almost like a weld. That lead to 2.
2. cleaning off the old gasket. Only way I can puit it was "What a
bitch"!
3. getting the top half of the seal out. Mine was grown in about like
the pan gasket. Get a length of brass rod just less than 1/4 inch
diameter to use as a driver so that you don't score the crank. I
pounded a good half inch mushroom on the end of the one I used before
that half seal finally broke loose. I had loosened all the main caps
and let the tranny droop just enough to take the pressure off but it
still took a BMFH and some serious pounding to get that thing out.
That was the worst one I ever tried to do and I've done a few. The
new one slipped in slick as snot. (Don't forget to lift the tranny
back up and re-torque the mains <g>).
Simple job, but the devil's in the details. Getting the old pan
gasket off is a royal pain but be sure it's all off and clean. I used
the 3-piece pan gasket set and that's fun to keep in place but I under
stand that there is a one piece gasket available that would simplify
things a bit.
On Thu, 19 Feb 2004 18:29:10 UTC jbcrow@flex.com (jbcrow) wrote:
> jbcrow@flex.com (jbcrow) wrote in message news:<ebd4f35d.0402190152.1cfaa180@posting.google. com>...
> > I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> > ever done one of these? It doesn't look too complicated (this is what
> > I've said with almost every repair I've ever undertaken!!!). Anything
> > in particular to watch for?
> >
> > TIA
> > JB
>
> One other note, this is the real oil seal and I plan on doing this
> with the engine in the vehicle. Am I overly optimistic about this not
> being too bad of a job?
>
> thanks again,
> JB
--
Will Honea <whonea@codenet.net>
02-19-2004, 04:19 PM
#17
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
http://www.neow.org/rms1.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
jbcrow wrote:
>
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
jbcrow wrote:
>
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
02-19-2004, 04:19 PM
#18
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
http://www.neow.org/rms1.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
jbcrow wrote:
>
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
jbcrow wrote:
>
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
02-19-2004, 04:19 PM
#19
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
http://www.neow.org/rms1.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
jbcrow wrote:
>
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
jbcrow wrote:
>
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
02-20-2004, 09:12 AM
#20
Guest
Posts: n/a
Re: Crank seal replace - 90 Cherokee
It is a relatively easy, but time consuming job in that the oil pan has to
be removed. I had to take one motor mount loose and jack the block a
little. You want to be very careful when putting the new one is so as not
to damage it.
Every time someone mentions replacing the rear main seal here, you get
several comments about the valve cover being your actual problem. Obviously
they have never seen a rear seal leak, but it is as common as the valve
cover in the 4.2 and the 4.0 after say, 80K miles, and very easy to
distinguish the difference.
That said, as they say, its easy to check for a leaking valve cover gasket.
--
JimG
80' CJ-7, 258 CID
35" BFG MT's on 15x10 Centerlines
4.56 D30-D44 SOA
D300 w/4:1 & Currie twin sticks
Warn 8000i w/dual batteries
LockRight F&R
"jbcrow" <jbcrow@flex.com> wrote in message
news:ebd4f35d.0402190152.1cfaa180@posting.google.c om...
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
be removed. I had to take one motor mount loose and jack the block a
little. You want to be very careful when putting the new one is so as not
to damage it.
Every time someone mentions replacing the rear main seal here, you get
several comments about the valve cover being your actual problem. Obviously
they have never seen a rear seal leak, but it is as common as the valve
cover in the 4.2 and the 4.0 after say, 80K miles, and very easy to
distinguish the difference.
That said, as they say, its easy to check for a leaking valve cover gasket.
--
JimG
80' CJ-7, 258 CID
35" BFG MT's on 15x10 Centerlines
4.56 D30-D44 SOA
D300 w/4:1 & Currie twin sticks
Warn 8000i w/dual batteries
LockRight F&R
"jbcrow" <jbcrow@flex.com> wrote in message
news:ebd4f35d.0402190152.1cfaa180@posting.google.c om...
> I'm looking to replace the rear crankshaft seal on a 90 XJ 4.0. Anyone
> ever done one of these? It doesn't look too complicated (this is what
> I've said with almost every repair I've ever undertaken!!!). Anything
> in particular to watch for?
>
> TIA
> JB
