Front Crankshaft Oil Seal Replacement how-to. - JeepForum.com
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Go Back JeepForum.com > Models > Jeep Liberty Forums > KJ Liberty Forum > Front Crankshaft Oil Seal Replacement how-to.

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Unread 05-23-2014, 01:22 PM   #1
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Front Crankshaft Oil Seal Replacement how-to.

I have had a mysterious oil leak for several months that I could not locate until I had changed my oil last week. My Jeep had never left any signs on the driveway, or on cardboard, but I would go through 1/2 to 1 full quart every fuel fill-up.

I had determined that my leak was from the front crankshaft oil seal. I bought the oil seal (National Oil Seals PN 710472) and began the tear-down process.

I first began by removing the intake tube and the radiator cover.
https://lh4.googleusercontent.com/-t...o/IMAG1348.jpg
https://lh4.googleusercontent.com/-n...o/IMAG1349.jpg

I then removed the washer fluid lid from the reservoir. It is riveted to the radiator cover. You do not need to remove it from the radiator cover.
https://lh6.googleusercontent.com/-k...o/IMAG1351.jpg

There are two rivets that connect the hood latch bracket to the radiator cover, these will need to be drilled out. Mine has been done previously, so I only had to remove the two screws.
https://lh6.googleusercontent.com/AF...w341-h192-p-no

I then disconnected the cooling fan connector. You will first have to pull out on the red tab, then reach in with a pick in order to release the tab.
https://lh4.googleusercontent.com/-3...o/IMAG1353.jpg

While some will argue that this step isn't necessary, I found it best to create some working room.
There are only two screws (10mm socket) that attach the electric cooling fan to the radiator.
Passenger side;
https://lh3.googleusercontent.com/cg...w371-h209-p-no

Drivers side located under the radiator hose;
https://lh3.googleusercontent.com/-o...o/IMAG1355.jpg

Now I have some working room.
https://lh5.googleusercontent.com/-Q...o/IMAG1356.jpg

I then removed the serpentine belt by using a 15mm socket on a breaker bar and loosened up the tensioner pulley.
https://lh4.googleusercontent.com/9d...w371-h209-p-no

In order to gain access to the front crankshaft seal, you will have to remove the harmonic dampener/pulley. Be sure to use a strap wrench to hold the engine from turning while breaking the bolt loose. I used an impact to remove mine. NEVER use an impact wrench to install the harmonic balancer bolt.
https://lh6.googleusercontent.com/-h...o/IMAG1358.jpg
https://lh4.googleusercontent.com/-y...o/IMAG1359.jpg

You will need a special tool in order to remove the harmonic balancer safely without damaging the pulley.This is what is pictured in the Owners Workshop Manual.
https://lh5.googleusercontent.com/-C...o/IMAG1362.jpg

This is what I had rented from Autozone. It worked flawlessly.
https://lh5.googleusercontent.com/Jf...w370-h209-p-no
https://lh6.googleusercontent.com/-g...o/IMAG1365.jpg

Now I can clean the area and pull out the old oil seal. As you can tell it's been leaking for some time now.
https://lh4.googleusercontent.com/Cg...w119-h209-p-no

I used a large screw driver and a block of wood to pull out the oil seal. It's rather difficult but it got the job done.
https://lh4.googleusercontent.com/-n...o/IMAG1369.jpg

I began by cleaning out all the sludge and dirt from the sealing sorface areas before I installed the oil seal. I then applied some new motor oil to the sealing surfaces of the new oil seal and installed it into the timing cover. Luckily I had a 4WD socket lying around to assist in a damage-free install job.
https://lh4.googleusercontent.com/eQ...w371-h209-p-no
https://lh4.googleusercontent.com/cP...w118-h209-p-no

It is highly recommended to use a harmonic balance installer tool, as that it is rather difficult to do it using a block of wood and a hammer, as how I had to do it. Once I got it about halfway on I lubed up the bolt and reinstalled it.
https://lh3.googleusercontent.com/lJ...w371-h209-p-no

Now that the harmonic balancer is installed, I reinstalled the serpentine belt, the cooling fan, the radiator cover, and the air intake tube.

I then double checked everything and started up the engine.
https://lh3.googleusercontent.com/9I...w368-h207-p-no

There you have it folks. It's a relatively easy job, IF you have all of the proper tools on hand. It will only take you a couple of hours to perform the work.

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Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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Unread 05-23-2014, 09:45 PM   #2
AVR2
Web Wheeler
1993 ZJ 
 
Join Date: Apr 2007
Location: UK
Posts: 2,565
Thanks, I need to do this soon. One small point, you don't have to drill out the rivets on the hood latch bracket. You can just unbolt it (two bolts at the bottom of the bracket) and it will come out in one piece with the radiator crossmember.
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Unread 05-23-2014, 10:28 PM   #3
tjkj2002
Registered User
2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,170
Wow kinda a lot of steps not needed.

When I did mine I just pulled the serp belt and changed the seal,took less then 20mins and never opened the hood.On a stock(ish) KJ without HD cooling pretty much the same but you have to open the hood.
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Unread 05-23-2014, 11:07 PM   #4
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
My older body doesn't fare well on working underneath like it use to, that's why I worked from the top side. True, one doesn't need to remove half of what I did, but like I had mentioned, I like room to work. Also, the hood release cable is attached to the bracket, that's why I had left it in place. I merely provided a process for anyone to follow, I figure that someone can, or will, do it as per their method.

Happy wheeling!
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Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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Unread 05-25-2014, 09:28 AM   #5
olliehopnoodle
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1982 FSJ Cherokee 
 
Join Date: Sep 2012
Location: mesa, az
Posts: 1,064
I think my seal is leaking too. I figured I would have to remove the timing cover so this will save a lot of time. (No way I could do it in 20 minutes)
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82 Cherokee WT - SOA/SF/agr box/Borgeson ujoint steering shaft/401/performer/holley TA/HEI/BeCool/727/np208/d44(aussie)/amc20(ARB)/BFG 35X12.5/Corbeau Moab Seats/RCI 6point Harness,Hella Aux lights/tuffy console/killer32 slider bars/custom bumpers and roll bar/Alpine head unit/amps/speakers 2002 Liberty Limited Early edition - Basically stock
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Unread 05-25-2014, 05:32 PM   #6
tjkj2002
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2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,170
Quote:
Originally Posted by remmons View Post
My older body doesn't fare well on working underneath like it use to, that's why I worked from the top side. True, one doesn't need to remove half of what I did, but like I had mentioned, I like room to work. Also, the hood release cable is attached to the bracket, that's why I had left it in place. I merely provided a process for anyone to follow, I figure that someone can, or will, do it as per their method.

Happy wheeling!
Yeah you gotta remember my KJ is not IFS anymore,which free's up a ton of space from underneath and lifted over twice as high as IFS lifted KJ's.Just laid under it on a creeper that had a reclining headrest and went to work.
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Unread 05-25-2014, 09:55 PM   #7
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Quote:
Originally Posted by tjkj2002 View Post
Yeah you gotta remember my KJ is not IFS anymore,which free's up a ton of space from underneath and lifted over twice as high as IFS lifted KJ's.Just laid under it on a creeper that had a reclining headrest and went to work.
That's gotta be roughin' it.
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Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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Unread 05-28-2014, 07:51 AM   #8
olliehopnoodle
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1982 FSJ Cherokee 
 
Join Date: Sep 2012
Location: mesa, az
Posts: 1,064
I don't think I could get to mine from the bottom. Between skid plates and suspensions. Heck, changing the oil filter is a PITA. I have a pair of the seals so when the time comes I will try it without pulling the timing cover first.
__________________
82 Cherokee WT - SOA/SF/agr box/Borgeson ujoint steering shaft/401/performer/holley TA/HEI/BeCool/727/np208/d44(aussie)/amc20(ARB)/BFG 35X12.5/Corbeau Moab Seats/RCI 6point Harness,Hella Aux lights/tuffy console/killer32 slider bars/custom bumpers and roll bar/Alpine head unit/amps/speakers 2002 Liberty Limited Early edition - Basically stock
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Unread 05-28-2014, 08:49 PM   #9
tjkj2002
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2002 KJ Liberty 
 
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Location: Colorado
Posts: 8,170
Quote:
Originally Posted by olliehopnoodle View Post
I don't think I could get to mine from the bottom. Between skid plates and suspensions. Heck, changing the oil filter is a PITA. I have a pair of the seals so when the time comes I will try it without pulling the timing cover first.


All the room in the world!!!!!
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'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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Unread 05-28-2014, 10:55 PM   #10
olliehopnoodle
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1982 FSJ Cherokee 
 
Join Date: Sep 2012
Location: mesa, az
Posts: 1,064
LOL. I can tell the wife "But honey, it would be easier for me to change the oil".

Is that your exhaust running in front of the oil pan?
__________________
82 Cherokee WT - SOA/SF/agr box/Borgeson ujoint steering shaft/401/performer/holley TA/HEI/BeCool/727/np208/d44(aussie)/amc20(ARB)/BFG 35X12.5/Corbeau Moab Seats/RCI 6point Harness,Hella Aux lights/tuffy console/killer32 slider bars/custom bumpers and roll bar/Alpine head unit/amps/speakers 2002 Liberty Limited Early edition - Basically stock
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Unread 05-28-2014, 11:26 PM   #11
tjkj2002
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2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,170
Quote:
Originally Posted by olliehopnoodle View Post

Is that your exhaust running in front of the oil pan?
Yeah,have to make room for the front driveshaft that now moves up and down a lot offroad.
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Unread 05-29-2014, 04:33 PM   #12
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Quote:
Originally Posted by tjkj2002 View Post


All the room in the world!!!!!
What long arm kit did you use. It's obviously not a readily available kit for any KJ, is this one for a TJ maybe?
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Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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Unread 05-29-2014, 05:10 PM   #13
tjkj2002
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2002 KJ Liberty 
 
Join Date: Dec 2009
Location: Colorado
Posts: 8,170
Quote:
Originally Posted by remmons View Post
What long arm kit did you use. It's obviously not a readily available kit for any KJ, is this one for a TJ maybe?
I have the prototype Rock Lizard SFA kit,and yes used RE TJ long arms.
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Unread 05-29-2014, 05:12 PM   #14
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Quote:
Originally Posted by tjkj2002 View Post
I have the prototype Rock Lizard SFA kit,and yes used RE TJ long arms.
I thought that I had recognized those, but didn't want to stick my foot in my mouth. This is something that I will be interested in the near future on another Liberty, once I find the one that I am looking for.
__________________
Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
remmons is offline   Reply With Quote Quick reply to this message
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