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Unread 11-10-2014, 09:58 AM   #1
UTKJK
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Oil Leak - Crankshaft Seal

I've had a leak in my '07 JK since I got it 2 years ago.

It looses about a quart a month, so about a year ago we changed out the rear main seal. No luck, still leaks at about the same pace.

After further investigation, it looked to be the crankshaft seal (front seal). So we changed it. It gave us some issues, and we had to change about 2-3 times. But it's still leaking.

Question - Any tricks to getting the seal in without it leaking? We applied oil to the seal an lightly tapped it in with a screw driver. I've read some posts (not for JK's specifically) were a socket was used to push it back into place. Does anyone know what size sock can be used for a JK? Once the seal is in location, does anything else need to be done (e.g. RTV)?

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Unread 11-10-2014, 10:46 AM   #2
ronjenx
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Have you cleaned all oil residue off and look for it to come back, possibly from a source higher than the crankshaft?
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Unread 11-10-2014, 10:58 AM   #3
JeepNewb
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If you see it pooling by, and then dripping from your bell housing dust cover it could be the timing chain cover. There was a problem in the 07's with Chrysler using a porous timing chain cover material. It creates a leak that seems to pool by the bell housing. There is info on it if you search and in the TSB.

Had mine replaced earlier this year.
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Unread 11-12-2014, 03:37 PM   #4
UTKJK
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Where do you buy a timing chain cover? Would an Advanced Auto or Auto Zone carry that or is that a dealership item?
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Unread 11-12-2014, 04:07 PM   #5
jwmbishop
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Quote:
Originally Posted by UTKJK View Post
Where do you buy a timing chain cover? Would an Advanced Auto or Auto Zone carry that or is that a dealership item?
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Unread 11-12-2014, 07:42 PM   #6
Jiblet
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Quote:
Originally Posted by JeepNewb
If you see it pooling by, and then dripping from your bell housing dust cover it could be the timing chain cover. There was a problem in the 07's with Chrysler using a porous timing chain cover material. It creates a leak that seems to pool by the bell housing. There is info on it if you search and in the TSB. Had mine replaced earlier this year.
Here's the TSB

http://project-jk.com/images/tsb/TSB_09-008-07.pdf
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Unread 11-12-2014, 09:40 PM   #7
NIUPonyBoy
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subscribing as I am SURE I will need this later.
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Unread 11-14-2014, 02:44 PM   #8
UTKJK
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We're going to try to change the seal again.

1. When setting the seal, how far back should we push it?
Can pushing it too far or far enough cause it to leak?

2. Anyone know the size of socket that you can use to push the seal in?

3. If it is the timing chain cover, where will I notice the leak coming from?
Right now I'm sure it's coming from the crankshaft seal, because the pulley is throwing it all over the place. And it wasn't doing that before I changed tht seal.
I actually found oil ONTOP of my hood. From the tracks, it looks like it was slung on the tire, which slung it on the tire fender, and the wind blew it up on the hood.
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Unread 11-24-2014, 10:16 PM   #9
870
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use a socket that is the same size as the metal ring of the seal. Spring always goes towards the oil.
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