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Unread 04-16-2013, 01:18 PM   #1
JohnC7
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1997 ZJ 
 
Join Date: Jun 2012
Location: Nanaimo, BC - British Columbia
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So I finally have the oil drip issue. This actually started happening after doing an oil change. I started using mobil 1 synthetic (been using castrol synthetic for a year now), with mobil 1 filter. Noticed the drain plug had a little leak, it was already tight, leaking a little less now. The oil filter seems to be leaking from where the filter attaches to. Also a drip coming from a bolt that might be from the rear main seal.

I just want some confirmation of whats exactly leaking before I go and replace the rear main seal and o ring for the filter adapter. The dip stick isnt showing bad levels either, borderline safe and over full, so i'm not losing any oil really fast.

Also the jeep has 132,000 KMs

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Unread 04-16-2013, 04:13 PM   #2
kensnelling
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Would be best if you cleaned everything off down there, then after driving for a day or two the leaks should be easier to see. With all the oil it's hard to tell if it's a filter leaking or the filter stand, pan gasket, rear main. valve cover or what.

Ken
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Unread 04-16-2013, 04:17 PM   #3
Moparmissus
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1994 ZJ 
 
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Mine started after an oil change, too. Are you certain there aren't any pieces of an old gasket under the new filter? As to leaking at the plug, I can't tell from the pic but is your washer still in place? It was missing from mine Jeep when I got it.
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Unread 04-16-2013, 05:01 PM   #4
JohnC7
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Yea, I'll go to a car wash and pressure wash the under area, hope they don't mind me using my wheel ramps hehe. As for the oil filter, I'm sure there isn't anything affecting the rubber seal. As always I put a little oil on the rubber seal on the filter. And the brownish rubber washer is indeed still on the plug.

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Unread 04-16-2013, 05:59 PM   #5
Foundrydude
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I would go for the filter adapter O ring first.

This is assuming it's not the filter itself leaking. Looks dented, and sometimes you trap a pebble or whatever and they leak til you remove and clean the seal.

Then I'd wash it up real thoroughly to be triple sure it was the rear main before doing that nasty job.

It wouldn't make a lot of sense for a rear main leak to make the oil filter drippy on a 4.0. Fiter is kind of high and forward in comparison

good luck
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Unread 04-16-2013, 08:26 PM   #6
JohnC7
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Could I unscrew the filter a little bit but not completely off and try cleaning the area? or do i have to drain the oil pan to remove the oil filter?

What I'm seeing from wiping things and seeing the drips appear again, are three leaks. These leaks just started happening after an oil change a couple weeks ago i did.

1. from a bolt from the vertical flat pan area (the direction where the drain plug is facing)

2. the drain plug it self is leaking for some reason (it is indeed tightly screwed in)

3. the oil filter. I noticed a little bit of pooling on the underside of the filter. I tried taking pictures of the pool in the pictures above but i guess i didnt get it.

these are the 3 areas.
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Unread 04-17-2013, 12:19 PM   #7
Moparmissus
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Always look for the highest, most forward point to identify your leak. That is assuming you've not been out driving around and blowing it all over your engine again! lol After I got mine cleaned up I literally got under it when it was running to find the leaks - with a very trusted person on the brake pedal. My leaks are at the adapter and at one spot on the pan - taking care of those while getting the tranny swapped out.
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Unread 04-17-2013, 01:19 PM   #8
JohnC7
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I went to the car wash to pressure wash the driping areas. Got home and already had one forming. This is a bolt on a pan like part where the starter attaches to. all the other spots show no sign of drip yet.

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Unread 04-17-2013, 01:23 PM   #9
slickslack
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i've got the same leak which i'm pretty sure caused my starter to go.

i'm suspecting the distributor O-ring as a possible since its dripping off some wiring coming from that direction...
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Unread 04-17-2013, 05:12 PM   #10
JohnC7
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So why is that bolt leaking and what spot is that?
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Unread 04-17-2013, 06:48 PM   #11
Foundrydude
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Quote:
Originally Posted by JohnC7 View Post
So why is that bolt leaking and what spot is that?
It's not the bolt leaking. It's oil leaked up higher that's run down to the lowest point on the engine to form a drip
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Unread 04-18-2013, 11:28 AM   #12
JohnC7
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Maybe it's weird to me, but I'm not seeing any oil runs from the rear main to that bolt. I think I'm gonna bring out my pressure washer, the the jeep on the ramps and spray that panel really well.

I'm also starting to see a little bit of pooling where the oil filter goes on. I can't really see behind the adapter to get a look to see if the oil is coming from there. Will keep posting as I learn.

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Unread 04-18-2013, 12:33 PM   #13
mholmes7979
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Look at the oil sending unit. High suspect!
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Unread 04-18-2013, 04:04 PM   #14
AmishFury
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Quote:
Originally Posted by JohnC7 View Post
or do i have to drain the oil pan to remove the oil filter?
no... the only oil that will drain from the filter is the oil that is in the filter... the oil in the pan only moves into the filter when the engine is running

you will want to start the engine and check your oil level after putting the filter back on though
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Unread 04-18-2013, 07:42 PM   #15
todras
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Probably rear main seal. I know mine leaks and when I replaced my starter had all kinds of dirty oil on the starter engagement arm. Using non synth will help slow the leak a lot. Synth has a lot of detergents and Mobil 1 probable more than what you were previously using.
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